{"id":5131,"date":"2023-03-02T00:10:52","date_gmt":"2023-03-01T15:10:52","guid":{"rendered":"https:\/\/obenkyolab.com\/?p=5131"},"modified":"2023-03-02T00:10:52","modified_gmt":"2023-03-01T15:10:52","slug":"%e3%80%90python%e3%80%91numpy%e3%81%ae%e5%9f%ba%e6%9c%ac","status":"publish","type":"post","link":"https:\/\/obenkyolab.com\/?p=5131","title":{"rendered":"\u3010Python\u3011Numpy\u306e\u57fa\u672c"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/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\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><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><\/span><\/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:\/\/obenkyolab.com\/?p=5131\/#Numpy%E3%81%AE%E3%83%89%E3%82%AD%E3%83%A5%E3%83%A1%E3%83%B3%E3%83%88\" >Numpy\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#Numpy%E9%85%8D%E5%88%97%EF%BC%88ndarray%EF%BC%89%E3%81%AE%E5%9F%BA%E6%9C%AC\" >Numpy\u914d\u5217\uff08ndarray\uff09\u306e\u57fa\u672c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#ndarray%E3%81%AE%E4%BD%9C%E6%88%90\" >ndarray\u306e\u4f5c\u6210<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E6%AC%A1%E5%85%83ndim%E3%81%AE%E7%A2%BA%E8%AA%8D%EF%BC%88%E4%B8%80%E6%AC%A1%E5%85%83%EF%BC%89\" >\u6b21\u5143(ndim)\u306e\u78ba\u8a8d\uff08\u4e00\u6b21\u5143\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E8%A6%81%E7%B4%A0%E6%95%B0size%E3%81%AE%E7%A2%BA%E8%AA%8D\" >\u8981\u7d20\u6570(size)\u306e\u78ba\u8a8d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E5%BD%A2%E7%8A%B6shape%E3%81%AE%E7%A2%BA%E8%AA%8D\" >\u5f62\u72b6(shape)\u306e\u78ba\u8a8d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E5%BD%A2%E7%8A%B6%E3%81%AE%E5%A4%89%E6%9B%B4%EF%BC%88reshape%EF%BC%89\" >\u5f62\u72b6\u306e\u5909\u66f4\uff08reshape\uff09<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E3%83%87%E3%83%BC%E3%82%BF%E5%9E%8B%E3%81%AE%E7%A2%BA%E8%AA%8D\" >\u30c7\u30fc\u30bf\u578b\u306e\u78ba\u8a8d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E5%9E%8B%E3%81%AE%E6%8C%87%E5%AE%9A\" >\u578b\u306e\u6307\u5b9a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E3%83%90%E3%82%A4%E3%83%88%E3%82%B5%E3%82%A4%E3%82%BA%E3%81%AE%E7%A2%BA%E8%AA%8D\" >\u30d0\u30a4\u30c8\u30b5\u30a4\u30ba\u306e\u78ba\u8a8d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E3%82%A2%E3%83%89%E3%83%AC%E3%82%B9%E3%81%AE%E7%A2%BA%E8%AA%8D\" >\u30a2\u30c9\u30ec\u30b9\u306e\u78ba\u8a8d<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#ndarray%E3%81%AE%E6%93%8D%E4%BD%9C\" >ndarray\u306e\u64cd\u4f5c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E8%A6%81%E7%B4%A0%E3%82%92%E6%8C%87%E5%AE%9A%E3%81%97%E3%81%A6ndarray%E3%82%92%E4%BD%9C%E6%88%90\" >\u8981\u7d20\u3092\u6307\u5b9a\u3057\u3066ndarray\u3092\u4f5c\u6210<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%E3%81%AEndarray\" >\u7b49\u5dee\u6570\u5217\u306endarray<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E6%95%B0%E5%AD%A6%E7%9A%84%E3%81%AA%E6%93%8D%E4%BD%9C\" >\u6570\u5b66\u7684\u306a\u64cd\u4f5c<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E6%9C%80%E5%A4%A7%E3%83%BB%E6%9C%80%E5%B0%8F%E3%81%AE%E5%8F%96%E5%BE%97\" >\u6700\u5927\u30fb\u6700\u5c0f\u306e\u53d6\u5f97<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E5%90%88%E8%A8%88%E5%80%A4%E3%81%AE%E5%8F%96%E5%BE%97\" >\u5408\u8a08\u5024\u306e\u53d6\u5f97<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E7%B4%AF%E7%A9%8D%E5%80%A4%E3%81%AE%E5%8F%96%E5%BE%97\" >\u7d2f\u7a4d\u5024\u306e\u53d6\u5f97<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E6%8C%87%E6%95%B0%E9%96%A2%E6%95%B0\" >\u6307\u6570\u95a2\u6570<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E5%AF%BE%E6%95%B0\" >\u5bfe\u6570<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/obenkyolab.com\/?p=5131\/#%E5%B9%B3%E6%96%B9%E6%A0%B9\" >\u5e73\u65b9\u6839<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Numpy%E3%81%AE%E3%83%89%E3%82%AD%E3%83%A5%E3%83%A1%E3%83%B3%E3%83%88\"><\/span>Numpy\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>numpy\u306elearn\u306e\u30da\u30fc\u30b8\u304b\u3089\u52c9\u5f37\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><a href=\"https:\/\/numpy.org\/learn\/\">NumPy &#8211; Learn<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Numpy%E9%85%8D%E5%88%97%EF%BC%88ndarray%EF%BC%89%E3%81%AE%E5%9F%BA%E6%9C%AC\"><\/span>Numpy\u914d\u5217\uff08ndarray\uff09\u306e\u57fa\u672c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ndarray%E3%81%AE%E4%BD%9C%E6%88%90\"><\/span>ndarray\u306e\u4f5c\u6210<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>numpy\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3057\u3066\u914d\u5217\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<p><em><strong>INPUT<\/strong><\/em><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># numpy\u30e9\u30a4\u30d6\u30e9\u30ea\u30a4\u30f3\u30dd\u30fc\u30c8\nimport numpy as np\n\n# numpy\u914d\u5217\u3078\u306e\u683c\u7d0d\na = np.array([1, 2, 3])\na<\/code><\/pre><\/div>\n\n\n\n<p><em><strong>OUTPUT<\/strong><\/em><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([1, 2, 3])<\/code><\/pre><\/div>\n\n\n\n<p>\u683c\u7d0d\u3057\u305f\u914d\u5217\u306e\u578b\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002numpy\u914d\u5217\u306fndarray\u3068\u3044\u3046\u578b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>INPUT<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u578b\u306e\u78ba\u8a8d\ntype(a)<\/code><\/pre><\/div>\n\n\n\n<p><strong>OUTPUT<\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>numpy.ndarray<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%AC%A1%E5%85%83ndim%E3%81%AE%E7%A2%BA%E8%AA%8D%EF%BC%88%E4%B8%80%E6%AC%A1%E5%85%83%EF%BC%89\"><\/span>\u6b21\u5143(ndim)\u306e\u78ba\u8a8d\uff08\u4e00\u6b21\u5143\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>ndim\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u6b21\u5143\u6570\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><em><strong>INPUT<\/strong><\/em><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u4e00\u6b21\u5143\u306e\u5834\u5408\na = np.array([1, 2, 3])\n# \u6b21\u5143\u306e\u78ba\u8a8d\na.ndim<\/code><\/pre><\/div>\n\n\n\n<p><em><strong>OUTPUT<\/strong><\/em><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>1<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code># \u4e8c\u6b21\u5143\u306e\u5834\u5408\nb = np.array([[1, 2], [3, 4]])\nb.ndim<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>2<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A6%81%E7%B4%A0%E6%95%B0size%E3%81%AE%E7%A2%BA%E8%AA%8D\"><\/span>\u8981\u7d20\u6570(size)\u306e\u78ba\u8a8d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>size\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u8981\u7d20\u6570\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u4e00\u6b21\u5143\u306e\u5834\u5408\na = np.array([1, 2, 3])\na.size<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>3<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u4e8c\u6b21\u5143\u306e\u5834\u5408\nb = np.array([[1, 2], [3, 4]])\nb.size<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>4<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%BD%A2%E7%8A%B6shape%E3%81%AE%E7%A2%BA%E8%AA%8D\"><\/span>\u5f62\u72b6(shape)\u306e\u78ba\u8a8d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>shape\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067ndarray\u306e\u5f62\u72b6\u306e\u78ba\u8a8d\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># 1\u6b21\u5143\u306e\u5834\u5408\na = np.array([1, 2, 3])\na.shape<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>(3,)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># 2\u6b21\u5143\u306e\u5834\u5408\nb = np.array([[1, 2], [3, 4]])\nb.shape<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>b = np.array([[1, 2], [3, 4]])<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%BD%A2%E7%8A%B6%E3%81%AE%E5%A4%89%E6%9B%B4%EF%BC%88reshape%EF%BC%89\"><\/span>\u5f62\u72b6\u306e\u5909\u66f4\uff08reshape\uff09<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>reshape\u3092\u4f7f\u7528\u3057\u3066shape\u3092(2, 3)\u304b\u3089(3, 2)\u3078\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># (2, 3)\u306eshape\u306e\u4f5c\u6210\na = np.array([[1, 2, 3], [4, 5, 6]])\na.reshape((3,2))<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([[1, 2],\n       [3, 4],\n       [5, 6]])<\/code><\/pre><\/div>\n\n\n\n<p>\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306freshape\u306e\u969b\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u304cC-like\u306b\u306a\u308a\u307e\u3059\u304c\u3001order\u30aa\u30d7\u30b7\u30e7\u30f3\u3067Fortran-like\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3057\u3066\u5f62\u72b6\u5909\u66f4\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code>a.reshape((3,2), order = &#39;F&#39;)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([[1, 5],\n       [4, 3],\n       [2, 6]])<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%87%E3%83%BC%E3%82%BF%E5%9E%8B%E3%81%AE%E7%A2%BA%E8%AA%8D\"><\/span>\u30c7\u30fc\u30bf\u578b\u306e\u78ba\u8a8d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>dtype.name\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u578b\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u30c7\u30fc\u30bf\u578b\u306e\u78ba\u8a8d\nprint(np.array([1, 2, 3]).dtype.name)\nprint(np.array([1.5, 2.5, 3.5]).dtype.name)\nprint(np.array([&#39;a&#39;, &#39;b&#39;, &#39;c&#39;]).dtype.name)\nprint(np.array([1 + 1j, 2 + 1j, 3 + 1j]).dtype.name)\nprint(np.array([True, False]).dtype.name)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>int32\nfloat64\nstr32\ncomplex128\nbool<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%9E%8B%E3%81%AE%E6%8C%87%E5%AE%9A\"><\/span>\u578b\u306e\u6307\u5b9a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>ndarray\u306e\u4f5c\u6210\u6642\u306bdtype\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3067\u578b\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code>np.array([1, 2, 3], dtype = &#39;float64&#39;) <\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([1., 2., 3.])<\/code><\/pre><\/div>\n\n\n\n<p>\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u3092\u6307\u5b9a\u3057\u306a\u3044\u5834\u5408\na = np.array([1, 2.5, &#39;a&#39;])\nprint(a.dtype.name)\nfor i in range(len(a)):\n    print(type(a[i]))\n\n# \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u3092\u6307\u5b9a\u3057\u305f\u5834\u5408\na = np.array([1, 2.5, &#39;a&#39;], dtype = &#39;object&#39;)\nprint(a.dtype.name)\nfor i in range(len(a)):\n    print(type(a[i]))<\/code><\/pre><\/div>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>str1024\n&lt;class &#39;numpy.str_&#39;&gt;\n&lt;class &#39;numpy.str_&#39;&gt;\n&lt;class &#39;numpy.str_&#39;&gt;\n\nobject\n&lt;class &#39;int&#39;&gt;\n&lt;class &#39;float&#39;&gt;\n&lt;class &#39;str&#39;&gt;\n# (2, 3)\u306eshape\u306e<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%90%E3%82%A4%E3%83%88%E3%82%B5%E3%82%A4%E3%82%BA%E3%81%AE%E7%A2%BA%E8%AA%8D\"><\/span>\u30d0\u30a4\u30c8\u30b5\u30a4\u30ba\u306e\u78ba\u8a8d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>itemsize\u3092\u4f7f\u7528\u3057\u3066\u30d0\u30a4\u30c8\u30b5\u30a4\u30ba\u306e\u78ba\u8a8d\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u30d0\u30a4\u30c8\u30b5\u30a4\u30ba\u306e\u78ba\u8a8d int32\nint32 = np.array([1, 2]).itemsize\nprint(&#39;int32_byte : &#39;, int32)\n\n# \u30d0\u30a4\u30c8\u30b5\u30a4\u30ba\u306e\u78ba\u8a8d float64\nflt64 = np.array([1.5, 2.5]).itemsize\nprint(&#39;flt64_byte : &#39;, flt64)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>int32_byte :  4\nflt64_byte :  8<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%82%A2%E3%83%89%E3%83%AC%E3%82%B9%E3%81%AE%E7%A2%BA%E8%AA%8D\"><\/span>\u30a2\u30c9\u30ec\u30b9\u306e\u78ba\u8a8d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>data\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u30c7\u30fc\u30bf\u304c\u683c\u7d0d\u3055\u308c\u308b\u5148\u982d\u306e\u30dd\u30a4\u30f3\u30bf\u306e\u30a2\u30c9\u30ec\u30b9\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code>np.array([1, 2]).data<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>&lt;memory at 0x000001F6766D0C40&gt;<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ndarray%E3%81%AE%E6%93%8D%E4%BD%9C\"><\/span>ndarray\u306e\u64cd\u4f5c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%A6%81%E7%B4%A0%E3%82%92%E6%8C%87%E5%AE%9A%E3%81%97%E3%81%A6ndarray%E3%82%92%E4%BD%9C%E6%88%90\"><\/span>\u8981\u7d20\u3092\u6307\u5b9a\u3057\u3066ndarray\u3092\u4f5c\u6210<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u8981\u7d20\u304c\uff11\u3068\u306a\u308b\u914d\u5217\u306e\u4f5c\u6210<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u8981\u7d20\u304c0\u306endarray\u3092\u4f5c\u6210\nnp.zeros((2, 2))<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code># \u8981\u7d20\u304c0\u306endarray\nnp.zeros((2, 2))<\/code><\/pre><\/div>\n\n\n\n<p>\u8981\u7d20\u304c1\u3068\u306a\u308b\u914d\u5217\u306e\u4f5c\u6210<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u8981\u7d20\u304c1\u306endarray\nnp.ones((2, 2))<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code># \u8981\u7d20\u304c1\u306endarray\nnp.ones((2, 2))<\/code><\/pre><\/div>\n\n\n\n<p>\u30e9\u30f3\u30c0\u30e0\u306a\u5024\u3092\u8981\u7d20\u306b\u3082\u3064\u914d\u5217\u306e\u4f5c\u6210<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u8981\u7d20\u306b\u30e9\u30f3\u30c0\u30e0\u306a\u5024\u306endarray\nrg = np.random.default_rng()\nrg.random((2, 2))<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([[0.84665476, 0.05058694],\n       [0.09643972, 0.07346462]])<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%E3%81%AEndarray\"><\/span>\u7b49\u5dee\u6570\u5217\u306endarray<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>1\u3065\u306410\u8981\u7d20\u306endarray<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># 0\u304b\u308910\u8981\u7d20\nnp.arange(10)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])<\/code><\/pre><\/div>\n\n\n\n<p>5\u3065\u3064100\u307e\u3067\u306e\u6570\u5217<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># 1\u304b\u3089100\u307e\u3067\u306e\uff15\u3065\u3064\u5897\u3048\u308b\u6570\u5217\nnp.arange(1, 100, 5)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([ 1,  6, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61, 66, 71, 76, 81,\n       86, 91, 96])<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%95%B0%E5%AD%A6%E7%9A%84%E3%81%AA%E6%93%8D%E4%BD%9C\"><\/span>\u6570\u5b66\u7684\u306a\u64cd\u4f5c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%9C%80%E5%A4%A7%E3%83%BB%E6%9C%80%E5%B0%8F%E3%81%AE%E5%8F%96%E5%BE%97\"><\/span>\u6700\u5927\u30fb\u6700\u5c0f\u306e\u53d6\u5f97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>max, min\u3092\u4f7f\u7528\u3057\u3066\u6700\u5927\u30fb\u6700\u5c0f\u5024\u306e\u53d6\u5f97\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u6700\u5927\u3068\u6700\u5c0f\na = np.array([[2, 5],[1.5, 8]])\nprint(a.max())\nprint(a.min())<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>8.0\n1.5<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%90%88%E8%A8%88%E5%80%A4%E3%81%AE%E5%8F%96%E5%BE%97\"><\/span>\u5408\u8a08\u5024\u306e\u53d6\u5f97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>sum\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u8981\u7d20\u306e\u5408\u8a08\u5024\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code># \u5408\u8a08\u5024\u3092\u53d6\u5f97\na.sum()<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>16.5<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E7%B4%AF%E7%A9%8D%E5%80%A4%E3%81%AE%E5%8F%96%E5%BE%97\"><\/span>\u7d2f\u7a4d\u5024\u306e\u53d6\u5f97<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>cumsum\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u8981\u7d20\u5185\u306e\u5024\u306e\u7d2f\u7a4d\u5024\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code>a = np.array([[2, 5],[1.5, 8]])\n\n# \u7d2f\u7a4d\u5024\u306e\u8a08\u7b97\na.cumsum()<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([ 2. ,  7. ,  8.5, 16.5])<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%8C%87%E6%95%B0%E9%96%A2%E6%95%B0\"><\/span>\u6307\u6570\u95a2\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>exp\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code>np.exp(1)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>np.exp(1)<\/code><\/pre><\/div>\n\n\n\n<p>ndarray\u306b\u5bfe\u3057\u3066\u4f7f\u7528\u3059\u308b\u3068\u5404\u8981\u7d20\u306b\u5bfe\u3057\u3066\u8a08\u7b97\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code>np.exp(np.array([0, 1]))<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><br><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>array([1.        , 2.71828183])<\/code><\/pre><\/div>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%AF%BE%E6%95%B0\"><\/span>\u5bfe\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>log\u3067\u57fa\u5e95\u3092\u6307\u5b9a\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-python\" data-lang=\"Python\"><code>a = np.log(2.718281828459045)\nb = np.log10(10)\nprint(a)\nprint(b)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism off-numbers lang-plain\"><code>1.0\n1.0<\/code><\/pre><\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%B9%B3%E6%96%B9%E6%A0%B9\"><\/span>\u5e73\u65b9\u6839<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>sqrt\u95a2\u6570\u306b\u3088\u308a\u5e73\u65b9\u6839\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong><em>INPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>a = np.array([1, 4, 9, 10])\nnp.sqrt(a)<\/code><\/pre><\/div>\n\n\n\n<p><strong><em>OUTPUT<\/em><\/strong><\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>array([1.        , 2.        , 3.        , 3.16227766])<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Numpy\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 numpy\u306elearn\u306e\u30da\u30fc\u30b8\u304b\u3089\u52c9\u5f37\u3059\u308b&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":1218,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"ja","_original_post":"https:\/\/obenkyolab.com\/?p=5131","footnotes":""},"categories":[7],"tags":[],"class_list":["post-5131","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","ja"],"_links":{"self":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/5131","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5131"}],"version-history":[{"count":49,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/5131\/revisions"}],"predecessor-version":[{"id":5249,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/5131\/revisions\/5249"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/media\/1218"}],"wp:attachment":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}