{"id":5166,"date":"2022-03-03T23:02:58","date_gmt":"2022-03-03T14:02:58","guid":{"rendered":"https:\/\/broaden-your-horizons.com\/ai-ss\/?p=5166"},"modified":"2022-04-06T17:45:27","modified_gmt":"2022-04-06T08:45:27","slug":"type-conversion","status":"publish","type":"post","link":"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/type-conversion\/","title":{"rendered":"NumPy:\u3010bool\u5909\u63db,\u578b\u5909\u63db\u3011\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9"},"content":{"rendered":"<p><!--\u518d\u5229\u7528\u30d6\u30ed\u30c3\u30af\uff08numpy-header\uff09--><br \/>\n\n<p class=\"backlink\"><a href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/ai-top\/numpy\/\">page:[NumPy\u307e\u3068\u3081]<\/a><\/p>\n<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30b5\u30de\u30ea<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5909\u63db<ul><li>bool\u578b\u21d4one-hot\u30d9\u30af\u30c8\u30eb<\/li><\/ul><\/li><li>np.astype\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u578b\u5909\u63db<ul><li>\u6587\u5b57\u5217\u21d4int\u578b<\/li><li>\u6574\u6570\u21d4float\u578b<\/li><\/ul><\/li><\/ul>\n\n\n\n<!--\u76ee\u6b21\u3078\u3001\u30da\u30fc\u30b8\u306e\u5148\u982d\u3078-->\n<div id=\"backcontainer\"><a id=\"linkmokuji\" href=\"javascript:backContainer();\">\u76ee\u6b21\u3078\uff1e\uff1e<\/a>\u3000<a id=\"linktop\" href=\"#\">\u5148\u982d\u3078\uff1e\uff1e<\/a><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\u524d\u63d0<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>np.random.randn<ul><li>\n<a class=\"movelink\" href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/random\/#toc_id_3_7\">NumPy:\u3010np.random\u3011\u306e\u3042\u308c\u3053\u308c\uff08\u5b9f\u884c\u7d50\u679c\u3067\u8aac\u660e\uff09<\/a>\n<\/li><\/ul><\/li><li>np.arange<ul><li>\n<a class=\"movelink\" href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/arange\/#toc_id_2_1\">NumPy:\u3010\u5e8f\u6570,\u9806\u5217,\u500d\u6570,\u7b49\u5206\u5272\u3011\u306e\u5b9f\u884c\u7d50\u679c<\/a>\n<\/li><\/ul><\/li><\/ul>\n\n\n\n<!--\u76ee\u6b21\u3078\u3001\u30da\u30fc\u30b8\u306e\u5148\u982d\u3078-->\n<div id=\"backcontainer\"><a id=\"linkmokuji\" href=\"javascript:backContainer();\">\u76ee\u6b21\u3078\uff1e\uff1e<\/a>\u3000<a id=\"linktop\" href=\"#\">\u5148\u982d\u3078\uff1e\uff1e<\/a><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">bool\u578b\u3068one-hot\u30d9\u30af\u30c8\u30eb<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">bool\u578b\u3078\u306e\u5909\u63db<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u4f5c\u6210<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">import numpy as np\na = np.random.randn(3,3)\nprint(a)\nprint(a.shape)<\/code><\/pre>\n\n\n\n<pre class=\"result\" style=\"text-align:left;line-height:17px;font-family:Menlo,Consolas,monospace;font-size:14px;padding:30px 0px 10px 15px;margin-top:10px;padding-bottom:-30px!important;\">[[<font style=\"color:yellow;\">-0.04979643<\/font>  1.41875607 <font style=\"color:yellow;\">-0.82755787<\/font>]\n [ 0.15427139  0.94284317  0.74147436]\n [ 1.08626773  1.23793669 <font style=\"color:yellow;\">-0.94596466<\/font>]]\n(3, 3)\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5f62\u72b6(3,3)\u306endarray\uff08NumPy\u914d\u5217\uff09\u3092\u4f5c\u6210<\/li><li>\u30de\u30a4\u30ca\u30b9\u304c3\u304b\u6240\u3042\u308b<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">bool\u578b\u306b\u5909\u63db<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">b = a&lt;=0\n#b = (a&lt;=0) \u3068\u30ab\u30c3\u30b3\u306b\u3057\u3066\u3082\u3088\u3044\nprint(b)\nprint(b.shape)<\/code><\/pre>\n\n\n\n<pre class=\"result\" style=\"text-align:left;line-height:17px;font-family:Menlo,Consolas,monospace;font-size:14px;padding:30px 0px 10px 15px;margin-top:10px;padding-bottom:-30px!important;\">[[ <font style=\"color:yellow;\">True<\/font> False  <font style=\"color:yellow;\">True<\/font>]\n [False False False]\n [False False  <font style=\"color:yellow;\">True<\/font>]]\n(3, 3)\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>\u30de\u30a4\u30ca\u30b9\u306e\u7b87\u6240\u304cTrue\u306b\u306a\u3063\u305f<\/li><li>bool\u578b\u306b\u5909\u63db\u3067\u304d\u3066\u3044\u308b<\/li><\/ul>\n\n\n\n<!--\u76ee\u6b21\u3078\u3001\u30da\u30fc\u30b8\u306e\u5148\u982d\u3078-->\n<div id=\"backcontainer\"><a id=\"linkmokuji\" href=\"javascript:backContainer();\">\u76ee\u6b21\u3078\uff1e\uff1e<\/a>\u3000<a id=\"linktop\" href=\"#\">\u5148\u982d\u3078\uff1e\uff1e<\/a><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">one-hot\u30d9\u30af\u30c8\u30eb\u306b\u5909\u63db\u3059\u308b<\/h3>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">c = b.astype(np.int8)\nprint(c)\nprint(c.shape)<\/code><\/pre>\n\n\n\n<pre class=\"result\" style=\"text-align:left;line-height:17px;font-family:Menlo,Consolas,monospace;font-size:14px;padding:30px 0px 10px 15px;margin-top:10px;padding-bottom:-30px!important;\">[[<font style=\"color:yellow;\">1<\/font> 0 <font style=\"color:yellow;\">1<\/font>]\n [0 0 0]\n [0 0 <font style=\"color:yellow;\">1<\/font>]]\n(3, 3)\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>np.astype\u3092\u4f7f\u3046<ul><li>bool\u578b\u304b\u3089one-hot\u30d9\u30af\u30c8\u30eb\u306b\u5909\u63db\u3055\u308c\u305f<\/li><li>astype\u306f\u6b21\u9805\u3092\u53c2\u7167<\/li><\/ul><\/li><\/ul>\n\n\n\n<!--\u76ee\u6b21\u3078\u3001\u30da\u30fc\u30b8\u306e\u5148\u982d\u3078-->\n<div id=\"backcontainer\"><a id=\"linkmokuji\" href=\"javascript:backContainer();\">\u76ee\u6b21\u3078\uff1e\uff1e<\/a>\u3000<a id=\"linktop\" href=\"#\">\u5148\u982d\u3078\uff1e\uff1e<\/a><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">np.astype\uff08\u578b\u5909\u63db\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u6587\u5b57\u5217\u3092int\u578b\u306b\u5909\u63db<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u4f5c\u6210<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">import numpy as np\na = np.array(['2', '3'], dtype='&lt;U11')\nprint(a)\nprint(type(a[0]))<\/code><\/pre>\n\n\n\n<pre class=\"result\" style=\"text-align:left;line-height:17px;font-family:Menlo,Consolas,monospace;font-size:14px;padding:30px 0px 10px 15px;margin-top:10px;padding-bottom:-30px!important;\">['2' '3']\n&lt;class 'numpy.str_'&gt;\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6587\u5b57\u5217\u578b\u306endarray\uff08NumPy\u914d\u5217\uff09\u3092\u4f5c\u6210<ul><li>dtype='&lt;U11&#8217;\u3067\u6587\u5b57\u5217\u6307\u5b9a<\/li><\/ul><\/li><li>&#8216;&lt;U11&#8217;\u306b\u3064\u3044\u3066<ul><li>\u53c2\u8003\u8a18\u4e8b<\/li><li>\n<a class=\"movelink\" href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/datatype\/#toc_id_3_3\">NumPy:\u3010\u30c7\u30fc\u30bf\u578b\u3011\u78ba\u8a8d\u65b9\u6cd5\u3068\u5b9f\u884c\u7d50\u679c<\/a>\n<\/li><\/ul><\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u578b\u5909\u63db<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">b = a.astype(np.int8)\nc = a.astype(int)\nprint(b)\nprint(type(b[0]))\nprint(c)\nprint(type(c[0]))<\/code><\/pre>\n\n\n\n<pre class=\"result\" style=\"text-align:left;line-height:17px;font-family:Menlo,Consolas,monospace;font-size:14px;padding:30px 0px 10px 15px;margin-top:10px;padding-bottom:-30px!important;\">[2 3]\n&lt;class 'numpy.int8'&gt;\n[2 3]\n&lt;class 'numpy.int64'&gt;\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>b<ul><li>\u6587\u5b57\u5217\u3092int8\u306b\u5909\u63db\u3057\u305f<\/li><\/ul><\/li><li>c<ul><li>\u6587\u5b57\u5217\u3092int64\u306b\u5909\u63db\u3057\u305f<\/li><\/ul><\/li><li>\u4ed6\u306bnp.int32\u3001np.uint8\u306e\u6307\u5b9a\u3082\u53ef\u80fd<ul><li>uint \u2026\u2026 unsigned\u306e\u7565\u3001\u8ca0\u306e\u6574\u6570\u306f\u6271\u3048\u306a\u3044\u306e\u3067\u6ce8\u610f<\/li><\/ul><\/li><\/ul>\n\n\n\n<!--\u76ee\u6b21\u3078\u3001\u30da\u30fc\u30b8\u306e\u5148\u982d\u3078-->\n<div id=\"backcontainer\"><a id=\"linkmokuji\" href=\"javascript:backContainer();\">\u76ee\u6b21\u3078\uff1e\uff1e<\/a>\u3000<a id=\"linktop\" href=\"#\">\u5148\u982d\u3078\uff1e\uff1e<\/a><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">\u6574\u6570\u304b\u3089\u6d6e\u52d5\u5c0f\u6570\u70b9\uff08float\uff09\u306b\u5909\u63db<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u4f5c\u6210<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">import numpy as np\na = np.arange(3)\nprint(a)\nprint(type(a[0]))<\/code><\/pre>\n\n\n\n<pre class=\"result\" style=\"text-align:left;line-height:17px;font-family:Menlo,Consolas,monospace;font-size:14px;padding:30px 0px 10px 15px;margin-top:10px;padding-bottom:-30px!important;\">[0 1 2]\n&lt;class 'numpy.int64'&gt;\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>int\u578b\u306endarray\uff08NumPy\u914d\u5217\uff09\u3092\u4f5c\u6210<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u578b\u5909\u63db<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">b = a.astype(np.float32)\nprint(b)\nprint(type(b[0]))<\/code><\/pre>\n\n\n\n<pre class=\"result\" style=\"text-align:left;line-height:17px;font-family:Menlo,Consolas,monospace;font-size:14px;padding:30px 0px 10px 15px;margin-top:10px;padding-bottom:-30px!important;\">[0. 1. 2.]\n&lt;class 'numpy.float32'&gt;\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>int\u578b\u304b\u3089float\u578b\u306b\u5909\u63db\u3055\u308c\u305f<ul><li>\u6570\u5b57\u306e\u5f8c\u308d\u306e\u300c.\u300d\uff08\u5c0f\u6570\u70b9\uff09\u304cfloat\u3092\u8868\u3057\u3066\u3044\u308b<\/li><\/ul><\/li><li>\u4ed6\u306bnp.float64\u3082\u6307\u5b9a\u3067\u304d\u308b<ul><li>np.float32\u3068\u306e\u9055\u3044\u306f\u6709\u52b9\u6841\u6570<\/li><\/ul><\/li><\/ul>\n\n\n\n<!--\u76ee\u6b21\u3078\u3001\u30da\u30fc\u30b8\u306e\u5148\u982d\u3078-->\n<div id=\"backcontainer\"><a id=\"linkmokuji\" href=\"javascript:backContainer();\">\u76ee\u6b21\u3078\uff1e\uff1e<\/a>\u3000<a id=\"linktop\" href=\"#\">\u5148\u982d\u3078\uff1e\uff1e<\/a><\/div>\n\n\n<p><!--\u518d\u5229\u7528\u30d6\u30ed\u30c3\u30af\uff08numpy-footer\uff09--><br \/>\n\n<div class=\"back-link\"><div class=\"wp-block-columns\">\n<div class=\"wp-block-column contents-link-line\"><p><a href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/ai-top\/ai-summary\/\">AI\u307e\u3068\u3081<\/a><\/p><\/div>\n<div class=\"wp-block-column contents-link-line\"><p><a href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/ai-top\/docker-wsl\/\">DOCKER\/WSL<\/a><\/p><\/div>\n<div class=\"wp-block-column contents-link-line\"><p><a href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/ai-top\/development\/\">AI\u958b\u767a<\/a><\/p><\/div>\n<\/div><div class=\"wp-block-columns\">\n<div class=\"wp-block-column contents-link-line nowon\"><p><a href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/ai-top\/library\/\">\u30e9\u30a4\u30d6\u30e9\u30ea<\/a><\/p><\/div>\n<div class=\"wp-block-column contents-link-line\"><p><a href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/ai-top\/pooping\/\">\u3046\u3093\u3061\u304f<\/a><\/p><\/div>\n<div class=\"wp-block-column contents-link-line blank\"><p><\/p><\/div>\n<!--<div class=\"wp-block-column contents-link-line blank\"><p><a href=\"#\"><\/a><\/p><\/div>-->\n<\/div><\/div>\n<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30b5\u30de\u30ea \u5909\u63db bool\u578b\u21d4one-hot\u30d9\u30af\u30c8\u30eb np.astype\u3092\u4f7f\u3063\u305f\u30c7\u30fc\u30bf\u578b\u5909\u63db \u6587\u5b57\u5217\u21d4int\u578b \u6574\u6570\u21d4float\u578b \u76ee\u6b21\u3078\uff1e\uff1e\u3000\u5148\u982d\u3078\uff1e\uff1e \u524d\u63d0 np.random.randn np.arange \u76ee\u6b21\u3078\uff1e\uff1e [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":282,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55],"tags":[47,54],"class_list":["post-5166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-numpy","tag-numpy","tag-54"],"_links":{"self":[{"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/posts\/5166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/comments?post=5166"}],"version-history":[{"count":19,"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/posts\/5166\/revisions"}],"predecessor-version":[{"id":7097,"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/posts\/5166\/revisions\/7097"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/media\/282"}],"wp:attachment":[{"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/media?parent=5166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/categories?post=5166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/broaden-your-horizons.com\/ai-ss\/wp-json\/wp\/v2\/tags?post=5166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}