{"id":599,"date":"2021-11-05T08:26:09","date_gmt":"2021-11-04T23:26:09","guid":{"rendered":"http:\/\/hituji1012.xsrv.jp\/?p=599"},"modified":"2026-08-01T13:51:09","modified_gmt":"2026-08-01T04:51:09","slug":"104","status":"publish","type":"post","link":"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/","title":{"rendered":"numpy\u306e\u4f7f\u3044\u65b9  \u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u65b9\u6cd5\u304b\u3089reshape,array\u306e\u4f7f\u3044\u65b9\u307e\u3067"},"content":{"rendered":"\n<p>\u4eca\u56de\u306fnumpy\u306e\u7fd2\u5f97\u3092\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>numpy\u306fpython\u3067\u306f\u5fc5\u9808\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u3057\u3063\u304b\u308a\u7fd2\u5f97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>numpy\u306f\u914d\u5217\u3068\u540c\u3058\u3067\u3059\u3002\u6570\u5024\u306e\u8a08\u7b97\u3001\u884c\u5217\u6f14\u7b97\u3067\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u6a5f\u68b0\u5b66\u7fd2\u306e\u8a08\u7b97\u306f\u884c\u5217\u8a08\u7b97\u304c\u591a\u3044\u306e\u3067\u3001\u3053\u306enumpy\u306b\u6163\u308c\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3059\u3002<\/p>\n<p>\u672c\u8a18\u4e8b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/p>\n<p><a href=\"http:\/\/hituji1012.xsrv.jp\/wp-content\/uploads\/2020\/12\/python10.zip\">&gt;&gt;\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9(jupyter notebook)<\/a><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_38 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #444444;color:#444444\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #444444;color:#444444\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#numpy%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6\" title=\"numpy\u306b\u3064\u3044\u3066\">numpy\u306b\u3064\u3044\u3066<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%82%A4%E3%83%B3%E3%82%B9%E3%83%88%E3%83%BC%E3%83%AB\" title=\"\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\">\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E8%AA%AD%E3%81%BF%E8%BE%BC%E3%81%BF\" title=\"\u8aad\u307f\u8fbc\u307f\">\u8aad\u307f\u8fbc\u307f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#numpy%E3%81%AE%E5%9F%BA%E7%A4%8E\" title=\"numpy\u306e\u57fa\u790e\">numpy\u306e\u57fa\u790e<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%83%87%E3%83%BC%E3%82%BF%E3%82%92%E4%BD%9C%E3%82%8B\" title=\"\u30c7\u30fc\u30bf\u3092\u4f5c\u308b\">\u30c7\u30fc\u30bf\u3092\u4f5c\u308b<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%82%BC%E3%83%AD%E5%80%A4\" title=\"\u30bc\u30ed\u5024\">\u30bc\u30ed\u5024<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#1%E3%81%AE%E5%80%A4\" title=\"1\u306e\u5024\">1\u306e\u5024<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E4%B9%B1%E6%95%B0\" title=\"\u4e71\u6570\">\u4e71\u6570<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#eye\" title=\"eye\">eye<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#listtuple%E3%81%8B%E3%82%89%E4%BD%9C%E3%82%8B\" title=\"list,tuple\u304b\u3089\u4f5c\u308b\">list,tuple\u304b\u3089\u4f5c\u308b<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%83%87%E3%83%BC%E3%82%BF%E3%82%92%E5%8F%96%E3%82%8A%E5%87%BA%E3%81%99\" title=\"\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3059\">\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3059<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%83%87%E3%83%BC%E3%82%BF%E8%AA%AD%E3%81%BF%E8%BE%BC%E3%81%BF\" title=\"\u30c7\u30fc\u30bf\u8aad\u307f\u8fbc\u307f\">\u30c7\u30fc\u30bf\u8aad\u307f\u8fbc\u307f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%83%87%E3%83%BC%E3%82%BF%E3%81%AE%E5%BD%A2%E3%81%AE%E7%A2%BA%E8%AA%8D\" title=\"\u30c7\u30fc\u30bf\u306e\u5f62\u306e\u78ba\u8a8d\">\u30c7\u30fc\u30bf\u306e\u5f62\u306e\u78ba\u8a8d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E5%9B%9B%E5%89%87%E6%BC%94%E7%AE%97\" title=\"\u56db\u5247\u6f14\u7b97\">\u56db\u5247\u6f14\u7b97<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%83%96%E3%83%AD%E3%83%BC%E3%83%89%E3%82%AD%E3%83%A3%E3%82%B9%E3%83%88\" title=\"\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\">\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E8%A1%8C%E5%88%97%E3%81%AE%E7%A9%8D\" title=\"\u884c\u5217\u306e\u7a4d\">\u884c\u5217\u306e\u7a4d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E4%B8%A6%E3%81%B3%E6%9B%BF%E3%81%88\" title=\"\u4e26\u3073\u66ff\u3048\">\u4e26\u3073\u66ff\u3048<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E8%A8%88%E7%AE%97\" title=\"\u8a08\u7b97\">\u8a08\u7b97<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#numpy%E3%81%AE%E5%BF%9C%E7%94%A8\" title=\"numpy\u306e\u5fdc\u7528\">numpy\u306e\u5fdc\u7528<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#reshape\" title=\"reshape\">reshape<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E8%BB%A2%E7%BD%AE\" title=\"\u8ee2\u7f6e\">\u8ee2\u7f6e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E7%B5%90%E5%90%88\" title=\"\u7d50\u5408\">\u7d50\u5408<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#argmax_argmin\" title=\"argmax, argmin\">argmax, argmin<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/#%E3%81%BE%E3%81%A8%E3%82%81\" title=\"\u307e\u3068\u3081\">\u307e\u3068\u3081<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"numpy%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6\"><\/span>numpy\u306b\u3064\u3044\u3066<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>numpy\u306f\u6570\u5024\u6f14\u7b97\u3092\u9ad8\u901f\u306b\u3067\u304d\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u306f\u591a\u6b21\u5143\u306e\u30c7\u30fc\u30bf\u3092\u6271\u3046\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u3001\u8868\u30c7\u30fc\u30bf\u89e3\u6790\u3001\u753b\u50cf\u51e6\u7406\u3001\u6a5f\u68b0\u5b66\u7fd2\u306e\u8a08\u7b97\u3092\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%A4%E3%83%B3%E3%82%B9%E3%83%88%E3%83%BC%E3%83%AB\"><\/span>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u306f\u4ed6\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u540c\u3058\u3088\u3046\u306b\u3001pip\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\">pip install numpy<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E8%AA%AD%E3%81%BF%E8%BE%BC%E3%81%BF\"><\/span>\u8aad\u307f\u8fbc\u307f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8aad\u307f\u8fbc\u307f\u306f\u6b21\u306e\u3088\u3046\u306b\u6c7a\u307e\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\">import numpy as np<\/pre>\n<p>\u4ed6\u306e\u4eba\u3082\u5168\u3066\u3053\u306e\u66f8\u304d\u65b9\u3067\u3059\u306e\u3067\u3001\u3053\u306e\u307e\u307e\u4f7f\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"numpy%E3%81%AE%E5%9F%BA%E7%A4%8E\"><\/span>numpy\u306e\u57fa\u790e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3067\u306f\u3001\u57fa\u790e\u3092\u7fd2\u5f97\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%87%E3%83%BC%E3%82%BF%E3%82%92%E4%BD%9C%E3%82%8B\"><\/span>\u30c7\u30fc\u30bf\u3092\u4f5c\u308b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u307e\u305a\u3001\u30c7\u30fc\u30bf\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30bc\u30ed\u3084\u4e71\u6570\u306a\u3069\u3092\u4f5c\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%82%BC%E3%83%AD%E5%80%A4\"><\/span><strong>\u30bc\u30ed\u5024<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u30bc\u30ed\u306e\u5024\u306f\u3001zeros\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 1\u6b21\u5143\u3067\u30bc\u30ed\u30923\u3064\r\na = np.zeros(3)\r\nprint(a)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[0. 0. 0.]<\/pre>\n<h4><span class=\"ez-toc-section\" id=\"1%E3%81%AE%E5%80%A4\"><\/span><strong>1\u306e\u5024<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>1\u306e\u5024\u306f\u3001ones\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 2\u6b21\u5143\u30671\u3092 2\u00d74\u3092\u4f5c\u6210\r\na = np.ones([2,4])\r\nprint(a)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[[1. 1. 1. 1.]\r\n [1. 1. 1. 1.]]<\/pre>\n<h4><span class=\"ez-toc-section\" id=\"%E4%B9%B1%E6%95%B0\"><\/span><strong>\u4e71\u6570<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u4e71\u6570\u306f\u3001\u8272\u3005\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u304c\u30010-1\u306e\u4e71\u6570\u306frandom.rand\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ed6\u306f\u3001\u4e0b\u8a18\u306e\u30ea\u30f3\u30af\u3092\u53c2\u8003\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><a href=\"https:\/\/docs.scipy.org\/doc\/numpy-1.12.0\/reference\/routines.random.html\" target=\"_blank\" rel=\"noopener\">&gt;&gt; \u4ed6\u306e\u4e71\u6570<\/a><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 1\u6b21\u5143\u30670-1\u306e\u4e71\u6570\u30923\u3064\r\na = np.random.rand(3)\r\nprint(a)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[0.73866986 0.95248467 0.46058571]<\/pre>\n<h4><span class=\"ez-toc-section\" id=\"eye\"><\/span>eye<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5358\u4f4d\u884c\u5217\u306feye\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u5358\u4f4d\u884c\u5217\u306a\u306e\u3067\u30013\u00d73\u306a\u3069\u884c\u5217\u540c\u3058\u6570\u5024\u306a\u306e\u3067\u30011\u3064\u306e\u6570\u5024\u3092\u6e21\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 3\u00d73\u306e\u5358\u4f4d\u884c\u5217\r\na = np.eye(3)\r\nprint(a)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[[1. 0. 0.]\r\n [0. 1. 0.]\r\n [0. 0. 1.]]<\/pre>\n<h4><span class=\"ez-toc-section\" id=\"listtuple%E3%81%8B%E3%82%89%E4%BD%9C%E3%82%8B\"><\/span>list,tuple\u304b\u3089\u4f5c\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>list\u3084tuple\u304b\u3089\u5909\u63db\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>array\u30e1\u30bd\u30c3\u30c9\u306b\u5165\u308c\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># \u30ea\u30b9\u30c8\u304b\u3089\u4f5c\u308b\r\nlist_a = [[1,2,3],\r\n          [4,5,6],\r\n          [7,8,9]]\r\na = np.array(list_a)\r\nprint(a)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[[1 2 3]\r\n [4 5 6]\r\n [7 8 9]]<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%87%E3%83%BC%E3%82%BF%E3%82%92%E5%8F%96%E3%82%8A%E5%87%BA%E3%81%99\"><\/span>\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3059<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u307e\u305a\u30011\u6b21\u5143\u304b\u3089\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u57fa\u672c\u7684\u306b\u306f\u3001list\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 1\u6b21\u5143\r\na = np.array([1,2,3,4,5])\r\n# 1\u3064\u53d6\u308a\u51fa\u3059\r\nprint(a[1])\r\n# \u8907\u6570\u53d6\u308a\u51fa\u3059\r\nprint(a[1:4])<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">2\r\n[2 3 4]<\/pre>\n<p>index\u306f0\u304b\u3089\u59cb\u307e\u308a\u307e\u3059\u3002<\/p>\n<p>\u8907\u6570\u53d6\u5f97\u306e\u5834\u5408\u3001\u958b\u59cbindex\uff1a\u7d42\u4e86index\u3068\u3059\u308b\u3051\u3069\u3001\u7d42\u4e86index\u306e1\u3064\u524d\u307e\u3067\u306e\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3057\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306b\u30012\u6b21\u5143\u3067\u3059\u3002list\u306f\u5404\u6b21\u5143\u3092[]\u3067\u533a\u5207\u308a\u307e\u3059\u3002<\/p>\n<p>numpy\u306e\u5834\u5408\u306f\u3001\u5404\u6b21\u5143\u3092\u30ab\u30f3\u30de\u300c,\u300d\u3067\u533a\u5207\u3063\u3066\u6b32\u3057\u3044\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<p>\u30b3\u30fc\u30c9\u3067\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 2\u6b21\u5143\r\nlist_a = [[1,2,3],\r\n          [4,5,6],\r\n          [7,8,9]]\r\na = np.array(list_a)\r\n\r\n# list\u306e\u5834\u5408\r\nprint(list_a[1][1:3])\r\n\r\n# numpy\u306e\u5834\u5408\r\nprint(a[1, 1:3])<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[5, 6]\r\n[5 6]<\/pre>\n<p>&nbsp;<\/p>\n<p>\u540c\u3058\u30c7\u30fc\u30bf\u3092\u53d6\u308a\u51fa\u3057\u3066\u3044\u307e\u3059\u304c\u3001\u8a18\u8ff0\u304c\u9055\u3044\u307e\u3059\u306d\u3002<\/p>\n<p>\u591a\u6b21\u5143\u914d\u5217\u306fnumpy\u3092\u4f7f\u3046\u3053\u3068\u304c\u591a\u3044\u306e\u3067\u3001\u3053\u306e\u8a18\u8ff0\u306b\u3082\u6163\u308c\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%87%E3%83%BC%E3%82%BF%E8%AA%AD%E3%81%BF%E8%BE%BC%E3%81%BF\"><\/span>\u30c7\u30fc\u30bf\u8aad\u307f\u8fbc\u307f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u3093\u3067\u3001numpy\u3067\u8a08\u7b97\u3059\u308b\u3068\u3044\u3046\u65b9\u6cd5\u306f\u3088\u304f\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u30d5\u30a1\u30a4\u30eb\u304b\u3089list\u3084pandas.DataFrame\u306b\u8aad\u307f\u8fbc\u3093\u3067\u3001numpy\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u8aad\u307f\u8fbc\u3093\u3067\u307f\u307e\u3059\u3002<\/p>\n<p>\u6b21\u306e\u5185\u5bb9\u306e\u300csample.txt\u300d\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u4e2d\u8eab\">1,2,3\r\n4,5,6\r\n7,8,9<\/pre>\n<p>\u30b3\u30e1\u30f3\u30c8\u5165\u308c\u3066\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u51e6\u7406\u3092\u9806\u756a\u306b\u307f\u3066\u3044\u3063\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># \u30d5\u30a1\u30a4\u30eb\u304b\u3089list \u305d\u3057\u3066 numpy\u306b\r\nlist_a = []\r\nwith open('sample.txt') as f:\r\n    # 1\u884c\u305a\u3064\u8aad\u307f\u8fbc\u307f\r\n    for d in f.readlines():\r\n        # \u6539\u884c\u3092\u524a\u9664\r\n        txt_line = d.rstrip()\r\n        # \u30ab\u30f3\u30de\u533a\u5207\u308a\u3067\u5206\u3051\u3066\u3001list_a\u306b\u8ffd\u52a0\r\n        list_a.append(txt_line.split(','))\r\n# list\u306e\u8868\u793a\r\nprint(list_a)\r\n\r\n# numpy\u306b\u5909\u63db\r\na = np.array(list_a)\r\nprint(a)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[['1', '2', '3'], ['4', '5', '6'], ['7', '8', '9']]\r\n[['1' '2' '3']\r\n ['4' '5' '6']\r\n ['7' '8' '9']]<\/pre>\n<p>\u6b21\u306b\u3001numpy\u306e<a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.loadtxt.html\" target=\"_blank\" rel=\"noopener\">loadtxt<\/a>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u307f\u307e\u3059\u3002<\/p>\n<p>\u533a\u5207\u308a\u6587\u5b57\u306f\u30ab\u30f3\u30de\u3067\u3059\u304c\u3001delimiter\u3067\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># loadtxt\u30e1\u30bd\u30c3\u30c9\u3001\u533a\u5207\u308a\u6587\u5b57\u306b\u300c,\u300d\u3092\u6307\u5b9a\r\na = np.loadtxt('sample.txt', delimiter=',')\r\nprint(a)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[[1. 2. 3.]\r\n [4. 5. 6.]\r\n [7. 8. 9.]]<\/pre>\n<p>\u30e1\u30bd\u30c3\u30c9\u4f7f\u3063\u305f\u65b9\u304c\u697d\u3067\u3059\u306d\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%87%E3%83%BC%E3%82%BF%E3%81%AE%E5%BD%A2%E3%81%AE%E7%A2%BA%E8%AA%8D\"><\/span>\u30c7\u30fc\u30bf\u306e\u5f62\u306e\u78ba\u8a8d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8a08\u7b97\u3057\u3066\u3044\u308b\u904e\u7a0b\u3067\u3001\u30c7\u30fc\u30bf\u306e\u6b21\u5143\u6570\u306a\u3069\u5f62\u304c\u5909\u308f\u3063\u3066\u3044\u304f\u306e\u3067\u3001\u308f\u304b\u3089\u306a\u304f\u306a\u3063\u305f\u3089\u3001\u30c7\u30fc\u30bf\u306e\u5f62\u3092\u78ba\u8a8d\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u306e\u5f62\u306f\u3001\u4f55\u6b21\u5143\u3067\u3001\u5404\u6b21\u5143\u4f55\u500b\u305a\u3064\u30c7\u30fc\u30bf\u304c\u3042\u308b\u304b\u3068\u3044\u3046\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u78ba\u8a8d\u306b\u306f\u3001<a href=\"https:\/\/numpy.org\/devdocs\/reference\/generated\/numpy.shape.html\" target=\"_blank\" rel=\"noopener\">shape<\/a>\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u78ba\u8a8d\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\">a = np.array([[1,2,3],\r\n              [4,5,6]])\r\nprint(a.shape)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">(2, 3)<\/pre>\n<p>2\u884c\u00d73\u5217\u306e\u30c7\u30fc\u30bf\u306a\u306e\u3067\u3001(2, 3)\u3068\u51fa\u307e\u3059\u3002<\/p>\n<p>3\u6b21\u5143\u306b\u306a\u308b\u3068(1\u6b21\u5143\u6570, 2\u6b21\u5143\u6570, 3\u6b21\u5143\u6570)\u3068\u7d9a\u304d\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%9B%9B%E5%89%87%E6%BC%94%E7%AE%97\"><\/span>\u56db\u5247\u6f14\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u56db\u5247\u6f14\u7b97\u3067\u306f\u3001\u540c\u3058\u8981\u7d20\u540c\u58eb\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n<p>a\u3068b\u3092\u7528\u610f\u3057\u3066\u3001\u56db\u5247\u6f14\u7b97\u3092\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># \u56db\u5247\u6f14\u7b97\r\na = np.array([[1,2,3],\r\n              [4,5,6]])\r\nb = np.array([[1,2,3],\r\n              [4,5,6]])\r\nprint('\u8db3\u3057\u7b97\\n', a+b)\r\nprint('\u5f15\u304d\u7b97\\n', a-b)\r\nprint('\u639b\u3051\u7b97\\n', a*b)\r\nprint('\u5272\u308a\u7b97\\n', a\/b)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">\u8db3\u3057\u7b97\r\n [[ 2  4  6]\r\n [ 8 10 12]]\r\n\u5f15\u304d\u7b97\r\n [[0 0 0]\r\n [0 0 0]]\r\n\u639b\u3051\u7b97\r\n [[ 1  4  9]\r\n [16 25 36]]\r\n\u5272\u308a\u7b97\r\n [[1. 1. 1.]\r\n [1. 1. 1.]]<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%96%E3%83%AD%E3%83%BC%E3%83%89%E3%82%AD%E3%83%A3%E3%82%B9%E3%83%88\"><\/span>\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>numpy\u3067\u306f\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3068\u3044\u3046\u8003\u3048\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u5148\u307b\u3069\u3001\u56db\u5247\u6f14\u7b97\u3092\u3057\u307e\u3057\u305f\u304c\u3001\u5168\u90e8\u306e\u8981\u7d20\u306b1\u3092\u8db3\u3059\u3068\u304d\u306b\u3001\u540c\u3058\u884c\u5217\u6570\u5206\u306e1\u3092\u7528\u610f\u3059\u308b\u306e\u3067\u306f\u3001\u9762\u5012\u3067\u3059\u306d\u3002<\/p>\n<p>\u306a\u306e\u3067\u3001\u591a\u6b21\u5143\u306e\u30c7\u30fc\u30bf\u3067\u30821\u3092\u8db3\u3059\u3060\u3051\u3067\u3001\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u3067\u306f\u6b21\u306e\u3088\u3046\u306b\u3001\u884c\u5217\u6570\u3092\u5897\u3084\u3057\u3066\u8db3\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_1.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_1.png\" alt=\"\" width=\"400\" height=\"253\" class=\"aligncenter size-full wp-image-7100\" srcset=\"https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_1.png 400w, https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_1-300x190.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u30b3\u30fc\u30c9\u3067\u3001\u307f\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 1\u3092\u8db3\u3059\r\na = np.array([[1,2,3],\r\n              [4,5,6]])\r\nb = 1\r\nprint(a+b)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[[2 3 4]\r\n [5 6 7]]<\/pre>\n<p>\u5168\u90e8\u306e\u8981\u7d20\u306b1\u304c\u8db3\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u3053\u306e\u30d6\u30ed\u30fc\u30c9\u30ad\u30e3\u30b9\u30c8\u306f\u3001\u884c\u6570\u304c\u540c\u3058\u30c7\u30fc\u30bf\u304c\u3042\u308c\u3070\u3001\u305d\u308c\u3092\u30b3\u30d4\u30fc\u3057\u3066\u8db3\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\u30012\u884c \u00d7 1\u5217\u306e\u30c7\u30fc\u30bf\u3092\u8db3\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 1\u3092\u8db3\u3059\r\na = np.array([[1,2,3],\r\n              [4,5,6]])\r\nb = np.array([[1], \r\n              [2]])\r\n# \u5f62\u78ba\u8a8d\r\nprint(\"\u30c7\u30fc\u30bf\u306e\u5f62\u78ba\u8a8d\", a.shape, b.shape)\r\n# \u540c\u3058\u884c\u6570\u306e(2, 1)\u3092\u8db3\u3057\u7b97\r\nprint(a+b)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">\u30c7\u30fc\u30bf\u306e\u5f62\u78ba\u8a8d (2, 3) (2, 1)\r\n[[2 3 4]\r\n [6 7 8]]<\/pre>\n<p>\u3053\u308c\u306f\u3001\u6b21\u306e\u56f3\u306e\u3088\u3046\u306b\u30012\u00d73\u30682\u00d71\u3092\u8db3\u3057\u7b97\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_2.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_2.png\" alt=\"\" width=\"400\" height=\"253\" class=\"aligncenter size-full wp-image-7099\" srcset=\"https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_2.png 400w, https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_2-300x190.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u5217\u6570\u306e\u6570\u3092\u5408\u308f\u305b\u3066(1, 3)\u306e\u30c7\u30fc\u30bf\u3092\u8db3\u3057\u3066\u3082\u3001\u8a08\u7b97\u3057\u3066\u304f\u308c\u308b\u306e\u3067\u3001\u8a66\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E8%A1%8C%E5%88%97%E3%81%AE%E7%A9%8D\"><\/span>\u884c\u5217\u306e\u7a4d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>numpy\u3067\u306f\u884c\u5217\u306e\u7a4d\u3082dot\u30e1\u30bd\u30c3\u30c9\u3067\u7c21\u5358\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>2\u00d73 \u3068 3\u00d72\u306e\u7a4d\u3092\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\">a = np.array([[1,2,3],\r\n              [4,5,6]])\r\nb = np.array([[1,2],\r\n              [3,4],\r\n              [5,6]])\r\n\r\n# \u5f62\u78ba\u8a8d\r\nprint(\"\u30c7\u30fc\u30bf\u306e\u5f62\u78ba\u8a8d\", a.shape, b.shape)\r\n\r\n# \u7a4d\r\nc = np.dot(a,b)\r\nprint(c)\r\nprint(c.shape)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">\u30c7\u30fc\u30bf\u306e\u5f62\u78ba\u8a8d (2, 3) (3, 2)\r\n[[22 28]\r\n [49 64]]\r\n(2, 2)<\/pre>\n<p>\u8a08\u7b97\u304c\u3042\u3063\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3059\u308b\u306e\u306f\u9762\u5012\u306a\u306e\u3067\u3001\u3057\u306a\u304f\u3066\u826f\u3044\u3067\u3059\u304c\u3001\u884c\u5217\u306e\u7a4d\u306e\u8a08\u7b97\u3092\u5fd8\u308c\u3066\u3044\u308b\u65b9\u306f\u3001\u4e0b\u8a18\u306ewiki\u3067\u78ba\u8a8d\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><strong><a href=\"https:\/\/ja.wikipedia.org\/wiki\/\u884c\u5217#\u4e57\u6cd5\" target=\"_blank\" rel=\"noopener\">&gt;&gt; \u884c\u5217\u306e\u7a4d<\/a><\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E4%B8%A6%E3%81%B3%E6%9B%BF%E3%81%88\"><\/span>\u4e26\u3073\u66ff\u3048<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4e26\u3079\u66ff\u3048\u3067\u306f\u3001<a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.sort.html\" target=\"_blank\" rel=\"noopener\">sort<\/a>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u30011\u6b21\u5143\u304b\u3089\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 1\u6b21\u5143\u306e\u4e26\u3073\u66ff\u3048\r\na = np.array([3,2,4,1,5])\r\na_sort = np.sort(a)\r\nprint(a_sort)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[1 2 3 4 5]<\/pre>\n<p>\u6b21\u306f\u30012\u6b21\u5143\u3067\u3059\u3002<\/p>\n<p>2\u6b21\u5143\u3067\u306f\u3001\u3069\u306e\u6b21\u5143\u3092\u4e26\u3073\u66ff\u3048\u308b\u304b\u306e\u6307\u5b9a\u3092axis=\u5bfe\u8c61\u6b21\u5143-1\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>\u5bfe\u8c61\u6b21\u5143\u30921\u6b21\u306e\u4e26\u3079\u66ff\u3048\u306a\u30890\u30012\u6b21\u306e\u4e26\u3073\u66ff\u3048\u306a\u30891\u3067\u3059\u3002<\/p>\n<p>\u307e\u305a\u30011\u6b21\u306e\u65b9\u3092\u307f\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 2\u6b21\u5143\u306e\u4e26\u3073\u66ff\u3048\r\na = np.array([[3,13,21],\r\n              [4,11,24],\r\n              [1,14,23]])\r\na_sort = np.sort(a, axis=0)\r\nprint(a_sort)<\/pre>\n<p><a href=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_3.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_3.png\" alt=\"\" width=\"400\" height=\"221\" class=\"aligncenter size-full wp-image-7098\" srcset=\"https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_3.png 400w, https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_3-300x166.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u6b21\u306b\u30012\u6b21\u306e\u65b9\u3092\u307f\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 2\u6b21\u5143\u306e\u4e26\u3073\u66ff\u3048\r\na = np.array([[13,4,21],\r\n              [14,2,24],\r\n              [1,14,2]])\r\na_sort = np.sort(a, axis=1)\r\nprint(a_sort)<\/pre>\n<p><a href=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_4.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_4.png\" alt=\"\" width=\"400\" height=\"231\" class=\"aligncenter size-full wp-image-7097\" srcset=\"https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_4.png 400w, https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_4-300x173.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u3069\u3046\u3067\u3057\u3087\u3046\u3001\u5143\u30c7\u30fc\u30bf\u304c\u4e26\u3079\u66ff\u3048\u3089\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E8%A8%88%E7%AE%97\"><\/span>\u8a08\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>numpy\u3067\u306f\u3001\u6700\u5927\u5024\u306a\u3069\u306e\u8a08\u7b97\u306f\u4e00\u901a\u308a\u826f\u3044\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<table style=\"border-collapse: collapse; width: 56.11353711790393%; height: 185px;\">\n<tbody>\n<tr>\n<td style=\"width: 50%; background-color: #8f8f8f; text-align: center;\"><span style=\"color: #000000;\">\u30e1\u30bd\u30c3\u30c9<\/span><\/td>\n<td style=\"width: 50%; background-color: #8f8f8f; text-align: center;\"><span style=\"color: #000000;\">\u6a5f\u80fd<\/span><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\">sum<\/td>\n<td style=\"width: 50%;\">\u5408\u8a08<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\">max<\/td>\n<td style=\"width: 50%;\">\u6700\u5927\u5024<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\">min<\/td>\n<td style=\"width: 50%;\">\u6700\u5c0f\u5024<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\">std<\/td>\n<td style=\"width: 50%;\">\u6a19\u6e96\u504f\u5dee<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\">mean<\/td>\n<td style=\"width: 50%;\">\u5e73\u5747<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 50%;\">median<\/td>\n<td style=\"width: 50%;\">\u4e2d\u592e\u5024<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<p>\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\">a = np.array([3,2,4,1,5])\r\nprint('\u5408\u8a08', np.sum(a))\r\nprint('\u6700\u5927\u5024', np.max(a))\r\nprint('\u6700\u5c0f\u5024', np.min(a))\r\nprint('\u6a19\u6e96\u504f\u5dee', np.std(a))\r\nprint('\u5e73\u5747', np.mean(a))\r\nprint('\u4e2d\u592e\u5024', np.median(a))<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">\u5408\u8a08 15\r\n\u6700\u5927\u5024 5\r\n\u6700\u5c0f\u5024 1\r\n\u6a19\u6e96\u504f\u5dee 1.4142135623730951\r\n\u6700\u5927\u5024 3.0\r\n\u6700\u5927\u5024 3.0<\/pre>\n<h2><span class=\"ez-toc-section\" id=\"numpy%E3%81%AE%E5%BF%9C%E7%94%A8\"><\/span>numpy\u306e\u5fdc\u7528<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3088\u308a\u8a73\u3057\u304f\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"reshape\"><\/span>reshape<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30c7\u30fc\u30bf\u306e\u3001\u884c\u5217\u6570\u306f\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u5909\u66f4\u306f\u3001<a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.reshape.html\" target=\"_blank\" rel=\"noopener\">reshape<\/a>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u5f15\u6570\u306b\u3001\u5909\u5f62\u3057\u305f\u3044\u6b21\u5143\u6570\u3092\u30ea\u30b9\u30c8\u3067\u6e21\u3057\u307e\u3059\u3002<\/p>\n<p>2\u00d73\u30922\u00d73\u306b\u5909\u3048\u3066\u307f\u307e\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\">a = np.array([[1,2,3],\r\n              [4,5,6]])\r\nprint('shape\u524d', a.shape)\r\n\r\na_reshape = a.reshape([3,2])\r\nprint('shape\u5f8c', a_reshape.shape)\r\na_reshape<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">shape\u524d (2, 3)\r\nshape\u5f8c (3, 2)\r\n[69]:\r\narray([[1, 2],\r\n       [3, 4],\r\n       [5, 6]])<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u30c7\u30fc\u30bf\u306e\u5f62\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E8%BB%A2%E7%BD%AE\"><\/span>\u8ee2\u7f6e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6b21\u306f\u8ee2\u7f6e\u3067\u3059\u3002<\/p>\n<p>\u8ee2\u7f6e\u3092\u5fd8\u308c\u305f\u65b9\u306f\u3001\u4e0b\u8a18\u306eWiki\u3092\u78ba\u8a8d\u3057\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n<strong><a href=\"https:\/\/ja.wikipedia.org\/wiki\/\u8ee2\u7f6e\u884c\u5217\" target=\"_blank\" rel=\"noopener\">&gt;&gt; wiki \u8ee2\u7f6e<\/a><\/strong><\/p>\n<p>\u8ee2\u7f6e\u306f<strong>T<\/strong>\u3068\u3059\u308b\u3060\u3051\u3067\u3059\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\">a = np.array([[1,2,3],\r\n              [4,5,6]])\r\nprint('\u8ee2\u7f6e\u524d', a.shape)\r\n\r\na_t = a.T\r\nprint('\u8ee2\u7f6e\u5f8c', a_t.shape)\r\na_reshape<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">\u8ee2\u7f6e\u524d (2, 3)\r\n\u8ee2\u7f6e\u5f8c (3, 2)\r\n[72]:\r\narray([[1, 2],\r\n       [3, 4],\r\n       [5, 6]])<\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E7%B5%90%E5%90%88\"><\/span>\u7d50\u5408<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6b21\u306f\u7d50\u5408\u3092\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p>\u7d50\u5408\u306f\u7e26\u65b9\u5411\u3001\u6a2a\u65b9\u5411\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305a\u3001\u7e26\u65b9\u5411\u306e\u7d50\u5408\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.vstack.html\" target=\"_blank\" rel=\"noopener\">vstack<\/a>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>vstack\u306e\u5f15\u6570\u306b\u7d50\u5408\u3059\u308b\u30c7\u30fc\u30bf2\u3064\u3092\u5165\u308c\u307e\u3059\u3002\u5217\u6570\u304c\u3042\u3063\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_5.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_5.png\" alt=\"\" width=\"362\" height=\"400\" class=\"aligncenter size-full wp-image-7096\" srcset=\"https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_5.png 362w, https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_5-272x300.png 272w\" sizes=\"(max-width: 362px) 100vw, 362px\" \/><\/a><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># vstack\r\na = np.array([[1,2,3],\r\n              [4,5,6]])\r\nb = np.array([[7,8,9]])\r\n\r\nc = np.vstack((a, b))\r\nprint(c.shape)\r\nprint(c)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">(3, 3)\r\n[[1 2 3]\r\n [4 5 6]\r\n [7 8 9]]<\/pre>\n<p>\u6b21\u306f\u6a2a\u65b9\u5411\u306b\u7d50\u5408\u3057\u307e\u3059\u3002<a href=\"https:\/\/numpy.org\/doc\/stable\/reference\/generated\/numpy.hstack.html\" target=\"_blank\" rel=\"noopener\">hstack<\/a>\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>hstack\u306e\u5f15\u6570\u306b\u7d50\u5408\u3059\u308b\u30c7\u30fc\u30bf2\u3064\u3092\u5165\u308c\u307e\u3059\u3002\u884c\u6570\u304c\u3042\u3063\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_6.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_6.png\" alt=\"\" width=\"400\" height=\"211\" class=\"aligncenter size-full wp-image-7095\" srcset=\"https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_6.png 400w, https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_6-300x158.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># hstack\r\na = np.array([[1,2],\r\n              [4,5]])\r\nb = np.array([[3],\r\n              [6],])\r\n\r\nc = np.hstack((a, b))\r\nprint(c.shape)\r\nprint(c)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">(2, 3)\r\n[[1 2 3]\r\n [4 5 6]]<\/pre>\n<p>\u30c7\u30fc\u30bf\u306e\u9023\u7d50\u3082\u305d\u3046\u3067\u3059\u304c\u3001\u753b\u50cf\u30c7\u30fc\u30bf\u3092\u6a2a\u4e26\u3073\u306b\u9023\u7d50\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"argmax_argmin\"><\/span>argmax, argmin<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>argmax,argmin\u3092\u4f7f\u3046\u3068\u3001\u6700\u5927\u3001\u6700\u5c0f\u5024\u306e\u5834\u6240\u3092index\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>sort\u306e\u3068\u3053\u308d\u3067\u3082\u51fa\u307e\u3057\u305f\u304c\u3001axis\u3067\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<p>axis\u3092\u7701\u7565\u3057\u305f\u5834\u5408\u306f\u3001\u5168\u90e8\u306e\u30c7\u30fc\u30bf\u306e\u6700\u5927\u5024\u306e\u5834\u6240\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_7.png\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/tetsumag.com\/wp-content\/uploads\/2021\/11\/numpy_7.png\" alt=\"\" width=\"400\" height=\"139\" class=\"aligncenter size-full wp-image-7101\" srcset=\"https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_7.png 400w, https:\/\/tetsumag.com\/blog\/wp-content\/uploads\/2021\/11\/numpy_7-300x104.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/a><\/p>\n<p>\u53d6\u5f97\u3059\u308b\u756a\u53f7\u306f0\u304b\u3089\u306e\u756a\u53f7\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>axis\u3092\u7701\u7565\u3057\u3066\u5834\u5408\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># \u5168\u90e8\u306e\u6700\u5927\u5024\r\na = np.array([[13,4,21],\r\n              [14,2,24],\r\n              [1,14,2]])\r\na_max = np.argmax(a)\r\nprint(a_max)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">5<\/pre>\n<p>&nbsp;<\/p>\n<p>axis=0\u306e\u5834\u5408\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 1\u6b21\u306e\u6700\u5927\u5024\r\na = np.array([[13,4,21],\r\n              [14,2,24],\r\n              [1,14,2]])\r\na_max = np.argmax(a, axis=0)\r\nprint(a_max)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[1 2 1]<\/pre>\n<p>axis=1\u306e\u5834\u5408\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\" title=\"In\"># 2\u6b21\u306e\u6700\u5927\u5024\r\na = np.array([[13,4,21],\r\n              [14,2,24],\r\n              [1,14,2]])\r\na_max = np.argmax(a, axis=1)\r\nprint(a_max)<\/pre>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"raw\" title=\"Out\">[2 2 1]<\/pre>\n<p>argmin\u306f\u5404\u81ea\u3067\u8a66\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u3053\u308c\u306f\u3001\u6a5f\u68b0\u5b66\u7fd2\u306e\u5206\u985e\u7d50\u679c\u3068\u304b\u306f\u3001[0.3, 0.1, 0.7]\u306a\u3069\u306e0-1\u306e\u30b9\u30b3\u30a2\u5024\u3067\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3042\u308a\u3001\u3069\u3053\u306e\u30b9\u30b3\u30a2\u304c\u9ad8\u3044\u304b\u78ba\u8a8d\u3059\u308b\u5834\u5408\u3068\u304b\u306b\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%BE%E3%81%A8%E3%82%81\"><\/span>\u307e\u3068\u3081<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u4ee5\u4e0a\u3001numpy\u306e\u4f7f\u3044\u65b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>numpy\u306fpython\u3067\u306f\u5fc5\u9808\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002\u6a5f\u68b0\u5b66\u7fd2\u306e\u8a08\u7b97\u306f\u884c\u5217\u8a08\u7b97\u304c\u591a\u3044\u306e\u3067\u3001numpy\u306b\u6163\u308c\u3066\u304a\u304f\u3068\u826f\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u56de\u306fnumpy\u306e\u7fd2\u5f97\u3092\u3057\u3066\u3044\u304d\u307e\u3059\u3002 numpy\u306fpython\u3067\u306f\u5fc5\u9808\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u3057\u3063\u304b\u308a\u7fd2\u5f97\u3057\u307e\u3057\u3087\u3046\u3002 numpy\u306f\u914d\u5217\u3068\u540c\u3058\u3067\u3059\u3002\u6570\u5024\u306e\u8a08\u7b97\u3001\u884c\u5217\u6f14\u7b97\u3067\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002 \u307e\u305f\u3001\u6a5f\u68b0\u5b66\u7fd2\u306e\u8a08\u7b97\u306f\u884c\u5217\u8a08 &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/tetsumag.com\/blog\/2021\/11\/05\/104\/\"> <span class=\"screen-reader-text\">numpy\u306e\u4f7f\u3044\u65b9  \u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u65b9\u6cd5\u304b\u3089reshape,array\u306e\u4f7f\u3044\u65b9\u307e\u3067<\/span> \u3082\u3063\u3068\u8aad\u3080 &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":7101,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","_themeisle_gutenberg_block_has_review":false},"categories":[127],"tags":[95],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/posts\/599"}],"collection":[{"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/comments?post=599"}],"version-history":[{"count":1,"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/posts\/599\/revisions"}],"predecessor-version":[{"id":16543,"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/posts\/599\/revisions\/16543"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/media\/7101"}],"wp:attachment":[{"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/media?parent=599"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/categories?post=599"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tetsumag.com\/blog\/wp-json\/wp\/v2\/tags?post=599"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}