{"id":17472,"date":"2022-05-02T03:17:00","date_gmt":"2022-05-02T03:17:00","guid":{"rendered":"https:\/\/club.informatix.co.jp\/?p=17472"},"modified":"2024-10-31T07:36:02","modified_gmt":"2024-10-31T07:36:02","slug":"numpy%e3%81%a7%e3%83%99%e3%82%af%e3%83%88%e3%83%ab-%e5%89%8d%e7%b7%a8%ef%bd%9cpython%e3%81%a7%e6%95%b0%e5%ad%a6%e3%82%92%e5%ad%a6%e3%81%bc%e3%81%86%ef%bc%81%e3%80%80%e7%ac%ac20%e5%9b%9e","status":"publish","type":"post","link":"https:\/\/club.informatix.co.jp\/?p=17472","title":{"rendered":"NumPy\u3067\u30d9\u30af\u30c8\u30eb <\u524d\u7de8>\uff5cPython\u3067\u6570\u5b66\u3092\u5b66\u307c\u3046\uff01 \u7b2c20\u56de"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a133f84bba32\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" 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: #999;color:#999\" 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><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a133f84bba32\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list 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ez-toc-heading-4\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#numpyarray%E3%81%AB%E3%82%88%E3%82%8B%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E8%A1%A8%E3%81%97%E6%96%B9\" >numpy.array()\u306b\u3088\u308b\u30d9\u30af\u30c8\u30eb\u306e\u8868\u3057\u65b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%BC%94%E7%AE%97%E3%80%80%E5%92%8C%E3%83%BB%E5%B7%AE%E3%83%BB%E3%82%B9%E3%82%AB%E3%83%A9%E3%83%BC%E5%80%8D\" >\u30d9\u30af\u30c8\u30eb\u306e\u6f14\u7b97\u3000\u548c\u30fb\u5dee\u30fb\u30b9\u30ab\u30e9\u30fc\u500d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E3%83%87%E3%83%BC%E3%82%BF%E5%8F%96%E5%BE%97\" >\u30d9\u30af\u30c8\u30eb\u306e\u30c7\u30fc\u30bf\u53d6\u5f97<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#%E3%82%A4%E3%83%B3%E3%83%87%E3%83%83%E3%82%AF%E3%82%B9%E6%8C%87%E5%AE%9A%E3%81%AB%E3%82%88%E3%82%8B%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%88%90%E5%88%86%E5%8F%96%E5%BE%97\" >\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6307\u5b9a\u306b\u3088\u308b\u30d9\u30af\u30c8\u30eb\u306e\u6210\u5206\u53d6\u5f97<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%AC%A1%E5%85%83%E5%8F%96%E5%BE%97%E3%81%AE%E6%96%B9%E6%B3%95%EF%BD%9Clen%E9%96%A2%E6%95%B0%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\" >\u30d9\u30af\u30c8\u30eb\u306e\u6b21\u5143\u53d6\u5f97\u306e\u65b9\u6cd5\uff5clen()\u95a2\u6570\u3092\u4f7f\u3046\u65b9\u6cd5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%AC%A1%E5%85%83%E5%8F%96%E5%BE%97%E3%81%AE%E6%96%B9%E6%B3%95%EF%BD%9C%E3%82%A4%E3%83%B3%E3%82%B9%E3%82%BF%E3%83%B3%E3%82%B9%E5%A4%89%E6%95%B0shape%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\" >\u30d9\u30af\u30c8\u30eb\u306e\u6b21\u5143\u53d6\u5f97\u306e\u65b9\u6cd5\uff5c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570shape\u3092\u4f7f\u3046\u65b9\u6cd5<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E5%86%85%E7%A9%8D\" >\u30d9\u30af\u30c8\u30eb\u306e\u5185\u7a4d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/club.informatix.co.jp\/?p=17472\/#%E5%88%97%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%82%92%E5%88%97%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%A8%E3%81%97%E3%81%A6%E3%81%A4%E3%81%8F%E3%82%8B\" >\u5217\u30d9\u30af\u30c8\u30eb\u3092\u5217\u30d9\u30af\u30c8\u30eb\u3068\u3057\u3066\u3064\u304f\u308b<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%AF%E3%81%98%E3%82%81%E3%81%AB%EF%BD%9C%E3%83%AC%E3%83%9D%E3%83%BC%E3%83%88\"><\/span>\u306f\u3058\u3081\u306b\uff5c\u30ec\u30dd\u30fc\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"aligncenter size-full wp-image-17479\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-1.jpg\" alt=\"\" width=\"800\" height=\"391\" srcset=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-1.jpg 800w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-1-300x147.jpg 300w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-1-768x375.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\u79c1\u304c\u6bce\u6708\u958b\u50ac\u3057\u3066\u3044\u308b\u685c\u4e95\u9032\u306ePython\uff65UNIX\u6559\u5ba4\u3010\u6570\u5b66\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b3\u30fc\u30b9\u30113\u6708\u306e\u30c6\u30fc\u30de\u306f\u300cPython\u3067\u30b3\u30b5\u30a4\u30f3\u985e\u4f3c\u5ea6\u300d\u3067\u3057\u305f\u3002<\/p>\n<p>\u7387\u76f4\u306b\u8a00\u3063\u3066\u3001\u9ad8\u6821\u6570\u5b66\u6559\u79d1\u66f8\u306b\u767b\u5834\u3059\u308b\u30d9\u30af\u30c8\u30eb\u306f\u3064\u307e\u3089\u306a\u3044\u3002\u3068\u304f\u306b\u5185\u7a4d\u3002\u53d7\u9a13\u6570\u5b66\u3067\u306f\u5185\u7a4d\u306f\u554f\u984c\u306e\u305f\u3081\u306e\u554f\u984c\u3067\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3068\u3053\u308d\u304c\u30c7\u30fc\u30bf\u30b5\u30a4\u30a8\u30f3\u30b9\u306e\u73fe\u5834\u3067\u306f\u3001\u30d9\u30af\u30c8\u30eb\u306e\u5185\u7a4d\u306f\u5f37\u529b\u306a\u30c4\u30fc\u30eb\u3068\u3057\u3066\u767b\u5834\u3057\u307e\u3059\u3002\u305d\u308c\u304c\u30b3\u30b5\u30a4\u30f3\u985e\u4f3c\u5ea6\uff08Cosine Similarity\uff09\u3067\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u30702\u3064\u306e\u6587\u66f8\u304c\u3069\u308c\u3060\u3051\u4f3c\u3066\u3044\u308b\u304b\u3092\u5b9a\u91cf\u7684\u306b\u6bd4\u8f03\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u524d\u7de8\u3067Python\u3067\u30d9\u30af\u30c8\u30eb\u3092\u6271\u3046\u65b9\u6cd5\u3001<a href=\"https:\/\/club.informatix.co.jp\/?p=17653\" target=\"_blank\" rel=\"noopener\">\u5f8c\u7de8<\/a>\u3067\u30b3\u30b5\u30a4\u30f3\u985e\u4f3c\u5ea6\u3092\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n<h2><span class=\"ez-toc-section\" id=\"Numpy%E3%83%A9%E3%82%A4%E3%83%96%E3%83%A9%E3%83%AA%E3%81%AF%E9%85%8D%E5%88%97%E3%82%92%E3%81%A4%E3%81%8F%E3%82%8B\"><\/span>Numpy\u30e9\u30a4\u30d6\u30e9\u30ea\u306f\u914d\u5217\u3092\u3064\u304f\u308b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NumPy\u30e9\u30a4\u30d6\u30e9\u30ea\u3053\u305d\u3001Python\u304c\u30c7\u30fc\u30bf\u30b5\u30a4\u30a8\u30f3\u30b9\u306e\u5206\u91ce\u3067\u4f7f\u308f\u308c\u308b\u5927\u304d\u306a\u7406\u7531\u3067\u3059\u3002NumPy\u306fNumerical Python\u306e\u7565\u3067\u3042\u308b\u3053\u3068\u304b\u3089\u308f\u304b\u308b\u3088\u3046\u306b\u3001\u6570\u5024\u8a08\u7b97\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3059\u3002<\/p>\n<p>NumPy\u306e\u30b3\u30a2\u90e8\u5206\u306fC\u8a00\u8a9e\u3067\u5b9f\u88c5\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u52b9\u7387\u7684\u304b\u3064\u9ad8\u5ea6\u306a\u6570\u5024\u8a08\u7b97\u3092\u9ad8\u901f\u5b9f\u884c\u3067\u304d\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>NumPy\u306fndarray\u3068\u547c\u3070\u308c\u308b\u578b\u4ed8\u304d\u306e\u591a\u6b21\u5143\u914d\u5217\u3092\u30c7\u30fc\u30bf\u69cb\u9020\u306e\u57fa\u672c\u3068\u3057\u3066\u3044\u308b\u3053\u3068\u3067\u3001\u30d9\u30af\u30c8\u30eb\u3084\u884c\u5217\u3092\u6271\u3046\u306e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NumPy%E3%81%AE%E3%82%A4%E3%83%B3%E3%83%9D%E3%83%BC%E3%83%88\"><\/span>NumPy\u306e\u30a4\u30f3\u30dd\u30fc\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&gt;&gt;&gt;\u3000import numpy as np<\/p>\n<p>NumPy\u3092\u4f7f\u3046\u306b\u306fNumPy\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u305f\u5f8c\u306b\u3001NumPy\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002NumPy\u306e\u7701\u7565\u540dnp\u306f\u4e16\u754c\u4e2d\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u30b3\u30fc\u30c9\u3092\u4ed6\u4eba\u3068\u5171\u6709\u3059\u308b\u3053\u3068\u3092\u8003\u3048\u308b\u3068\u3001NumPy\u306e\u3088\u3046\u306a\u6a19\u6e96\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u5bfe\u3057\u3066\u306f\u6163\u7fd2\u7684\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u7701\u7565\u540d\u3092\u4f7f\u3063\u305f\u65b9\u304c\u3044\u3044\u3067\u3057\u3087\u3046\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"numpyarray%E3%81%AB%E3%82%88%E3%82%8B%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E8%A1%A8%E3%81%97%E6%96%B9\"><\/span>numpy.array()\u306b\u3088\u308b\u30d9\u30af\u30c8\u30eb\u306e\u8868\u3057\u65b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>&gt;&gt;&gt;\u3000v = np.array([1, 2])<br \/>\n&gt;&gt;&gt;\u3000w = np.array([1, 2, 3])<\/p>\n<p>\u306e\u3088\u3046\u306bnumpy.array()\u95a2\u6570\u306e\u5f15\u6570\u306b\u914d\u5217[1, 2]\u3001[1, 2, 3]\u3092\u6e21\u3059\u3053\u3068\u3067\u5909\u6570v\u3001w\u306f\u30d9\u30af\u30c8\u30eb\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u6ce8\u610f\u3059\u3079\u304d\u70b9\u306f\u3001\u914d\u5217[1, 2]\u3001[1, 2, 3]\u306f\u6a2a\u66f8\u304d\u3067\u3059\u304c\u3001\u30d9\u30af\u30c8\u30ebv\u3001w\u306f\u5217\u30d9\u30af\u30c8\u30eb\u3067\u3042\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-17474\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-2.jpg\" alt=\"\" width=\"600\" height=\"311\" srcset=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-2.jpg 800w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-2-300x155.jpg 300w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-2-768x397.jpg 768w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\u30d9\u30af\u30c8\u30eb\u3060\u3051\u3092\u6271\u3046\u9650\u308a\u306b\u304a\u3044\u3066\u3001\u5217\u30d9\u30af\u30c8\u30eb\u3068\u884c\u30d9\u30af\u30c8\u30eb\u306f\u3069\u3061\u3089\u3092\u4f7f\u3063\u3066\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u308c\u304c\u3001\u884c\u5217\u3068\u30d9\u30af\u30c8\u30eb\u3092\u3044\u3063\u3057\u3087\u306b\u6271\u3046\u5834\u5408\uff08\u7dda\u5f62\u4ee3\u6570\u5b66\uff09\u306b\u306f\u5217\u30d9\u30af\u30c8\u30eb\u3068\u884c\u30d9\u30af\u30c8\u30eb\u306e\u533a\u5225\u30fb\u4f7f\u3044\u5206\u3051\u304c\u5fc5\u8981\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305d\u3053\u3067\u3001\u7c21\u5358\u306a\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u6b21\u306e\u3088\u3046\u306b\u30b3\u30fc\u30c9\u3092\u8a18\u8ff0\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>&gt;&gt;&gt;\u3000v = np.array([1,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30002])<br \/>\n&gt;&gt;&gt;\u3000w = np.array([1,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u3000 2,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u3000 3])<\/p>\n<p>\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u898b\u305f\u76ee\u3082\u5217\u30d9\u30af\u30c8\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%BC%94%E7%AE%97%E3%80%80%E5%92%8C%E3%83%BB%E5%B7%AE%E3%83%BB%E3%82%B9%E3%82%AB%E3%83%A9%E3%83%BC%E5%80%8D\"><\/span>\u30d9\u30af\u30c8\u30eb\u306e\u6f14\u7b97\u3000\u548c\u30fb\u5dee\u30fb\u30b9\u30ab\u30e9\u30fc\u500d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3053\u306e\u30d9\u30af\u30c8\u30eb\u306e\u8868\u3057\u65b9\u3092\u7528\u3044\u3066\u3001Python\u306b\u3088\u308b\u30d9\u30af\u30c8\u30eb\u6f14\u7b97\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u307e\u305a\u306f\u30d9\u30af\u30c8\u30eb\u306e\u548c\u30fb\u5dee\u30fb\u30b9\u30ab\u30e9\u30fc\u500d\u3067\u3059\u3002<\/p>\n<p>\u6b21\u306e\u3088\u3046\u306b\u3001\u548c\u30fb\u5dee\u306f\u7b49\u3057\u3044\u6210\u5206\u3069\u3046\u3057\u306e\u548c\u30fb\u5dee\u3068\u3057\u3066\u3001\u30b9\u30ab\u30e9\u30fc\u500d\u306f\u3059\u3079\u3066\u306e\u6210\u5206\u306e\u30b9\u30ab\u30e9\u30fc\u500d\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-17475\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-3.jpg\" alt=\"\" width=\"300\" height=\"405\" srcset=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-3.jpg 600w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-3-222x300.jpg 222w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<h4>\u8a08\u7b97\u4f8b<\/h4>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-17476\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-4.jpg\" alt=\"\" width=\"300\" height=\"532\" srcset=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-4.jpg 600w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-4-169x300.jpg 169w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-4-578x1024.jpg 578w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>&gt;&gt;&gt;\u3000a = np.array([1,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30002])<br \/>\n&gt;&gt;&gt;\u3000b = np.array([3,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30004])<br \/>\n&gt;&gt;&gt;\u3000print(a + b)<br \/>\n&gt;&gt;&gt;\u3000[4 6]<br \/>\n&gt;&gt;&gt;\u3000print(a &#8211; b)<br \/>\n&gt;&gt;&gt;\u3000[-2 -2]<br \/>\n&gt;&gt;&gt;\u3000print(3*a)<br \/>\n&gt;&gt;&gt;\u3000[3 6]<br \/>\n&gt;&gt;&gt;<br \/>\n&gt;&gt;&gt;\u3000c = np.array([1,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30002,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30003])<br \/>\n&gt;&gt;&gt;\u3000d = np.array([4,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30005,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30006])<br \/>\n&gt;&gt;&gt;\u3000print(c + d)<br \/>\n&gt;&gt;&gt;\u3000[5 7 9]<br \/>\n&gt;&gt;&gt;\u3000print(c &#8211; d)<br \/>\n&gt;&gt;&gt;\u3000[-3 -3 -3]<br \/>\n&gt;&gt;&gt;\u3000print(3*c)<br \/>\n&gt;&gt;&gt;\u3000[3 6 9]<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E3%83%87%E3%83%BC%E3%82%BF%E5%8F%96%E5%BE%97\"><\/span>\u30d9\u30af\u30c8\u30eb\u306e\u30c7\u30fc\u30bf\u53d6\u5f97<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%A4%E3%83%B3%E3%83%87%E3%83%83%E3%82%AF%E3%82%B9%E6%8C%87%E5%AE%9A%E3%81%AB%E3%82%88%E3%82%8B%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%88%90%E5%88%86%E5%8F%96%E5%BE%97\"><\/span>\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u6307\u5b9a\u306b\u3088\u308b\u30d9\u30af\u30c8\u30eb\u306e\u6210\u5206\u53d6\u5f97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>&gt;&gt;&gt;\u3000a = np.array([1,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30002])<br \/>\n&gt;&gt;&gt;\u3000a[0] # \u7b2c1\u6210\u5206 = python\u3067\u306f0\u756a\u76ee\u306e\u6210\u5206<br \/>\n&gt;&gt;&gt;\u30001<br \/>\n&gt;&gt;&gt;\u3000a[1] # \u7b2c2\u6210\u5206 = pytyhon\u3067\u306f1\u756a\u76ee\u306e\u6210\u5206<br \/>\n&gt;&gt;&gt;\u30002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%AC%A1%E5%85%83%E5%8F%96%E5%BE%97%E3%81%AE%E6%96%B9%E6%B3%95%EF%BD%9Clen%E9%96%A2%E6%95%B0%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\"><\/span>\u30d9\u30af\u30c8\u30eb\u306e\u6b21\u5143\u53d6\u5f97\u306e\u65b9\u6cd5\uff5clen()\u95a2\u6570\u3092\u4f7f\u3046\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3053\u308c\u304c\u4e00\u756a\u7c21\u5358\u3067\u3059\u3002<\/p>\n<p>&gt;&gt;&gt;\u3000len(a)<br \/>\n&gt;&gt;&gt;\u30002<br \/>\n&gt;&gt;&gt;\u3000c = np.array([1,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30002,<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000\u3000\u3000\u30003])<br \/>\n&gt;&gt;&gt;\u3000len(c)<br \/>\n&gt;&gt;&gt;\u30003<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E6%AC%A1%E5%85%83%E5%8F%96%E5%BE%97%E3%81%AE%E6%96%B9%E6%B3%95%EF%BD%9C%E3%82%A4%E3%83%B3%E3%82%B9%E3%82%BF%E3%83%B3%E3%82%B9%E5%A4%89%E6%95%B0shape%E3%82%92%E4%BD%BF%E3%81%86%E6%96%B9%E6%B3%95\"><\/span>\u30d9\u30af\u30c8\u30eb\u306e\u6b21\u5143\u53d6\u5f97\u306e\u65b9\u6cd5\uff5c\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570shape\u3092\u4f7f\u3046\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>ndarray\u306e\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u8981\u7d20\u6570\u306f\u3001\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570ahape\u3092\u7528\u3044\u3066\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>&gt;&gt;&gt;\u3000a.shape<br \/>\n&gt;&gt;&gt;\u3000(2,)<br \/>\n&gt;&gt;&gt;\u3000c.shape<br \/>\n&gt;&gt;&gt;\u3000(3,)<br \/>\n&gt;&gt;&gt;\u3000a.shape[0] # a.shape\u306e\u7b2c0\u6210\u5206<br \/>\n&gt;&gt;&gt;\u30002<br \/>\n&gt;&gt;&gt;\u3000c.shape[0] # c.shape\u306e\u7b2c0\u6210\u5206<br \/>\n&gt;&gt;&gt;\u30003<\/p>\n<p>\u3061\u306a\u307f\u306b\u3001ndarray\u306e\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b\u6b21\u5143\u6570\uff08\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570ndim\uff09\u306f\u3001\u30d9\u30af\u30c8\u30eb\u306e\u8981\u7d20\u6570\uff1d\u30d9\u30af\u30c8\u30eb\u306e\u6b21\u5143\u3001\u3068\u306f\u7570\u306a\u308b\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>ndim\u306b\u3064\u3044\u3066\u306f\u884c\u5217\u306e\u3068\u3053\u308d\u3067\u53d6\u308a\u4e0a\u3052\u307e\u3059\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%AE%E5%86%85%E7%A9%8D\"><\/span>\u30d9\u30af\u30c8\u30eb\u306e\u5185\u7a4d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u7b49\u3057\u3044\u6b21\u5143\u3069\u3046\u3057\u306e\u30d9\u30af\u30c8\u30eb\u306b\u5bfe\u3057\u3001\u30d9\u30af\u30c8\u30eb\u306e\u5185\u7a4d\u306f\u540c\u3058\u6210\u5206\u3069\u3046\u3057\u306e\u7a4d\u306e\u7dcf\u548c\u3068\u3057\u3066\u5b9a\u7fa9\u3055\u308c\u307e\u3059\u3002<\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-17477\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-5.jpg\" alt=\"\" width=\"300\" height=\"448\" srcset=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-5.jpg 600w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-5-201x300.jpg 201w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>\u5185\u7a4d\u306f\u82f1\u8a9e\u3067inner puduct\u3068\u547c\u3070\u308c\u308b\u4ed6\u306b\u8a18\u53f7\u30fb\u3092\u7528\u3044\u308b\u3053\u3068\u304b\u3089\u30c9\u30c3\u30c8\u7a4d\uff08dot product\uff09\u3068\u3082\u547c\u3070\u308c\u307e\u3059\u3002<\/p>\n<p>Python\u3067\u30d9\u30af\u30c8\u30eb\u306e\u5185\u7a4d\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\u306f\u3001\u95a2\u6570\u3001\u6f14\u7b97\u5b50\u3001\u30e1\u30bd\u30c3\u30c9\u306a\u3069\u3044\u304f\u3064\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>numpy.dot(a, b)\u95a2\u6570\u306b\u30d9\u30af\u30c8\u30eb\uff081\u6b21\u5143\u914d\u5217\uff09\u3092\u6e21\u3059\u65b9\u6cd5<\/li>\n<li>numpy.inner(a, b)\u95a2\u6570\u306b\u30d9\u30af\u30c8\u30eb\uff08\u591a\u6b21\u5143\u914d\u5217\uff09\u3092\u6e21\u3059\u65b9\u6cd5<\/li>\n<li>\u4e8c\u9805\u6f14\u7b97\u5b50@\u3000a@b<\/li>\n<li>dot\u30e1\u30bd\u30c3\u30c9\u3000a.dot(b)<\/li>\n<\/ul>\n<h4>\u8a08\u7b97\u4f8b<\/h4>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-17478\" src=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-6.jpg\" alt=\"\" width=\"400\" height=\"201\" srcset=\"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-6.jpg 600w, https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-6-300x151.jpg 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/>&gt;&gt;&gt;\u3000np.dot(a, b)<br \/>\n&gt;&gt;&gt;\u300011<br \/>\n&gt;&gt;&gt;\u3000np.inner(a, b)<br \/>\n&gt;&gt;&gt;\u300011<br \/>\n&gt;&gt;&gt;\u3000a@b<br \/>\n&gt;&gt;&gt;\u300011<br \/>\n&gt;&gt;&gt;\u3000a.dot(b)<br \/>\n&gt;&gt;&gt;\u300011<br \/>\n&gt;&gt;&gt;<br \/>\n&gt;&gt;&gt;\u3000np.dot(c, d)<br \/>\n&gt;&gt;&gt;\u300032<br \/>\n&gt;&gt;&gt;\u3000np.inner(c, d)<br \/>\n&gt;&gt;&gt;\u300032<br \/>\n&gt;&gt;&gt;\u3000c@d<br \/>\n&gt;&gt;&gt;\u300032<br \/>\n&gt;&gt;&gt;\u3000c.dot(d)<br \/>\n&gt;&gt;&gt;\u300032<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%88%97%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%82%92%E5%88%97%E3%83%99%E3%82%AF%E3%83%88%E3%83%AB%E3%81%A8%E3%81%97%E3%81%A6%E3%81%A4%E3%81%8F%E3%82%8B\"><\/span>\u5217\u30d9\u30af\u30c8\u30eb\u3092\u5217\u30d9\u30af\u30c8\u30eb\u3068\u3057\u3066\u3064\u304f\u308b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3053\u3053\u307e\u3067\u7528\u3044\u3066\u304d\u305fa = np.array([1, 2])\u3084c = np.array([1, 2, 3])\u306fndarray\u306e1\u6b21\u5143\u914d\u5217\u3068\u547c\u3070\u308c\u307e\u3059\u3002\u3053\u308c\u304c\u5217\u30d9\u30af\u30c8\u30eb\u3068\u3057\u3066\u632f\u308b\u821e\u3044\u307e\u3059\u3002<\/p>\n<p>\u5148\u306b\u8aac\u660e\u3057\u305f\u3088\u3046\u306b\u30b3\u30fc\u30c9\u306b\u6539\u884c\u3092\u3044\u308c\u3066\u898b\u305f\u76ee\u3092\u5217\u30d9\u30af\u30c8\u30eb\u306b\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304c\u3001\u51fa\u529b\u306f\u6a2a\u306e\u307e\u307e\u3067\u3059\u3002<\/p>\n<p>&gt;&gt;&gt;\u3000a<br \/>\n&gt;&gt;&gt;\u3000a.ndim<br \/>\n&gt;&gt;&gt;\u30001 # 1\u6b21\u5143\u914d\u5217<br \/>\n&gt;&gt;&gt;\u3000len(a)<br \/>\n&gt;&gt;&gt;\u30002 # 2\u6b21\u5143\u30d9\u30af\u30c8\u30eb<br \/>\n&gt;&gt;&gt;\u3000array([1, 2])<br \/>\n&gt;&gt;&gt;\u3000print(a)<br \/>\n&gt;&gt;&gt;\u3000[1, 2]<br \/>\n&gt;&gt;&gt;<br \/>\n&gt;&gt;&gt;\u3000c<br \/>\n&gt;&gt;&gt;\u3000c.ndim<br \/>\n&gt;&gt;&gt;\u30001 # 1\u6b21\u5143\u914d\u5217<br \/>\n&gt;&gt;&gt;\u3000len(c)<br \/>\n&gt;&gt;&gt;\u30003 # 3\u6b21\u5143\u30d9\u30af\u30c8\u30eb<br \/>\n&gt;&gt;&gt;\u3000array([1, 2, 3])<br \/>\n&gt;&gt;&gt;\u3000print(c)<br \/>\n&gt;&gt;&gt;\u3000[1, 2, 3]<\/p>\n<p>\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3053\u3068\u3067\u51fa\u529b\u3082\u5217\u3068\u3057\u3066\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>&gt;&gt;&gt;\u3000a.reshape(-1,1) # \u5217\u6570\u30921\u306b\u3059\u308b<br \/>\n&gt;&gt;&gt;\u3000array([[1],<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000[2]])<br \/>\n&gt;&gt;&gt;\u3000print(a.reshape(-1,1))<br \/>\n&gt;&gt;&gt;\u3000[[1]<br \/>\n&gt;&gt;&gt;\u3000 [2]]<br \/>\n&gt;&gt;&gt;<br \/>\n&gt;&gt;&gt;\u3000c.reshape(-1,1) # \u5217\u6570\u30921\u306b\u3059\u308b<br \/>\n&gt;&gt;&gt;\u3000array([[1],<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000[2],<br \/>\n&gt;&gt;&gt;\u3000\u3000\u3000\u3000[3]])<br \/>\n&gt;&gt;&gt;\u3000print(c.reshape(-1,1))<br \/>\n&gt;&gt;&gt;\u3000[[1]<br \/>\n&gt;&gt;&gt;\u3000 [2]<br \/>\n&gt;&gt;&gt;\u3000 [3]]<\/p>\n<p>reshape\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u308a\u914d\u5217\u306e\u5f62\u72b6\u3092\u5909\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u914d\u5217A.reshape(\u884c\u6570m, \u5217\u6570n)\u306b\u3088\u308a\u914d\u5217A\u3092m\u00d7n\u884c\u5217\u306b\u5909\u5f62\u3002<br \/>\n2\u6b21\u5143\u5217\u30d9\u30af\u30c8\u30eb\u306f2\u00d71\u884c\u5217\u306a\u306e\u3067\u3001np.array([1, 2]).reshape(2,1)\u3068\u3059\u308c\u3070\u51fa\u529b\u3082\u5217\u30d9\u30af\u30c8\u30eb\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u914d\u5217A.reshape(-1, \u5217\u6570)\u306e\u3088\u3046\u306b\u884c\u6570\u306b-1\u3092\u6307\u5b9a\u3059\u308b\u3068\u3001\u5217\u6570\u306b\u5bfe\u3057\u3066\u884c\u6570\u304c\u81ea\u52d5\u3067\u8a2d\u5b9a\u3055\u308c\u4fbf\u5229\u3067\u3059\u3002<\/p>\n<p>\u3053\u308c\u3067NumPy\u306b\u3088\u308b\u30d9\u30af\u30c8\u30eb\u306e\u6271\u3044\u65b9\u306e\u57fa\u672c\u306fOK\u3067\u3059\u3002<\/p>\n<p><a href=\"https:\/\/club.informatix.co.jp\/?p=17653\" target=\"_blank\" rel=\"noopener\">\u6b21\u56de\u5f8c\u7de8<\/a>\u306f\u30d9\u30af\u30c8\u30eb\u306e\u5185\u7a4d\u306e\u5fdc\u7528\u3067\u3042\u308b\u30b3\u30b5\u30a4\u30f3\u985e\u4f3c\u5ea6\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b\uff5c\u30ec\u30dd\u30fc\u30c8 \u79c1\u304c\u6bce\u6708\u958b\u50ac\u3057\u3066\u3044\u308b\u685c\u4e95\u9032\u306ePython\uff65UNIX\u6559\u5ba4\u3010\u6570\u5b66\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b3\u30fc\u30b9\u30113\u6708\u306e\u30c6\u30fc\u30de\u306f\u300cPython\u3067\u30b3\u30b5\u30a4\u30f3\u985e\u4f3c\u5ea6\u300d\u3067\u3057\u305f\u3002 \u7387\u76f4\u306b\u8a00\u3063\u3066\u3001\u9ad8\u6821\u6570\u5b66\u6559\u79d1\u66f8\u306b\u767b\u5834\u3059\u308b\u30d9\u30af &#8230; <\/p>\n","protected":false},"author":4,"featured_media":17475,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,464,526],"tags":[65,751],"class_list":["post-17472","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-4","category-hito-star-mathmatics","category-526","tag-python","tag-751"],"jetpack_featured_media_url":"https:\/\/club.informatix.co.jp\/wp-content\/uploads\/2022\/05\/20220503-3.jpg","_links":{"self":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/17472","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=17472"}],"version-history":[{"count":19,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/17472\/revisions"}],"predecessor-version":[{"id":20754,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/posts\/17472\/revisions\/20754"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=\/wp\/v2\/media\/17475"}],"wp:attachment":[{"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=17472"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=17472"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/club.informatix.co.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=17472"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}