{"id":5221,"date":"2022-03-04T14:57:45","date_gmt":"2022-03-04T05:57:45","guid":{"rendered":"https:\/\/broaden-your-horizons.com\/ai-ss\/?p=5221"},"modified":"2022-04-06T22:25:35","modified_gmt":"2022-04-06T13:25:35","slug":"from-4dim-to-2dim","status":"publish","type":"post","link":"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/from-4dim-to-2dim\/","title":{"rendered":"\u306a\u305cnp.dot\u306e\u524d\u306b\u30102\u6b21\u5143\u3011\u306b\u5909\u63db\u3059\u308b\u306e\u304b\uff1f"},"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\">\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u524d\u63d0<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>np.dot<ul><li>\n<a class=\"movelink\" href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/on-machine-learning\/#toc_id_3\">NumPy:\u3010\u6a5f\u68b0\u5b66\u7fd2\u3011\u3067\u4f7f\u3046\u884c\u5217\u8a08\u7b97<\/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><li>np.reshape<ul><li>\n<a class=\"movelink\" href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/shape-conversion\/#toc_id_3_1\">NumPy:\u3010\u6b21\u5143\u3092\u64cd\u4f5c\u3011\u3059\u308b\u65b9\u6cd5\u3044\u308d\u3044\u308d<\/a>\n<\/li><\/ul><\/li><li>\u30c6\u30f3\u30bd\u30eb<ul><li>\u4ee5\u4e0b\u306e\u30da\u30fc\u30b8\u306b\u8aac\u660e\u3042\u308a\uff08\u5916\u90e8\u30ea\u30f3\u30af\uff09<\/li><\/ul><\/li><\/ul>\n\n\n\n<div class=\"blogcard\"><a href=\"https:\/\/broaden-your-horizons.com\/engineer\/development-preparation\/machine-learning-library-primer\/post-1477\/#toc_id_1_1\" data-blogcard=\"1\"><\/a><\/div>\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\">\u753b\u50cf\u51e6\u7406<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6271\u3046\u30c7\u30fc\u30bf<ul><li>3\u6b21\u5143\u4ee5\u4e0a\u306e\u591a\u6b21\u5143\u30c6\u30f3\u30bd\u30eb<\/li><li>\u7573\u307f\u8fbc\u307f\u51e6\u7406\u306a\u3069\u3067\u91cd\u307f\u3068dot\u7a4d\u3092\u8a08\u7b97<\/li><\/ul><\/li><li>\u8a08\u7b97\u306e\u5de5\u592b<ul><li>\u591a\u6b21\u5143\u30c7\u30fc\u30bf\u3092\u305d\u306e\u307e\u307e\u8a08\u7b97\u3057\u306a\u3044<\/li><li>2\u6b21\u5143\u306b\u5909\u63db\u3057\u3066\u8a08\u7b97\u3059\u308b<\/li><\/ul><\/li><li>\u5f62\u72b6\u5909\u63db\u3057\u3066\u3082\u5927\u4e08\u592b\uff1f<ul><li>\u7d50\u8ad6\u306f\u5909\u63db\u3057\u3066\u3082\u8a08\u7b97\u7d50\u679c\u306f\u540c\u3058<\/li><li>\u9ad8\u901f\u306b\u8a08\u7b97\u3067\u304d\u308b2\u6b21\u5143\uff08\u884c\u5217\uff09\u306b\u5909\u63db<ul><li>\u30bf\u30a4\u30c8\u30eb\u306e\u7591\u554f\u306b\u5bfe\u3059\u308b\u56de\u7b54<\/li><\/ul><\/li><\/ul><\/li><li>\u4ee5\u964d\u3067\u306f\u3001\u672c\u5f53\u306b\u5927\u4e08\u592b\u306a\u306e\u304b\u4ee5\u964d\u306e\u5b9f\u884c\u30ed\u30b0\u3092\u898b\u306a\u304c\u3089\u8aac\u660e\u3057\u307e\u3059<\/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\">\u5f62\u72b6\u5909\u63db\u3057\u3066\u3082\u8a08\u7b97\u7d50\u679c\u306f\u540c\u3058\u304b\uff1f<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><span style=\"background-color: #8a2be2\" class=\"background-color\"><span style=\"color: #ffffff\" class=\"text-color\">4\u6b21\u5143\u306f\u6570\u5b57\u304c\u591a\u304f\u306a\u308b\u306e\u3067\u30013\u6b21\u5143\u3067\u8aac\u660e<\/span><\/span><\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u30c7\u30fc\u30bf\u4f5c\u6210<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u5909\u63db\u3059\u308b\u65b9\u306e\u30c7\u30fc\u30bf<\/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(12).reshape(3,2,2)\nb = a.reshape(-1,2)\nprint(a)\nprint(a.shape)\nprint(b)\nprint(b.shape)<\/code><\/pre>\n\n\n\n<div class=\"prev_box\" style=\"margin-top:30px\">\n    <input type=\"checkbox\" id=\"label1\">\n    <label for=\"label1\" style=\"user-select:none\">\u5168\u6587\u8868\u793a<\/label>\n    <div class=\"all_show\" for=\"label1\" style=\"margin-top:-15px\">\n    <!--\u975e\u8868\u793a\u3053\u3053\u304b\u3089-->\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]\n  [ 2  3]]\n\n [[ 4  5]\n  [ 6  7]]\n\n [[ 8  9]\n  [10 11]]]\n<font style=\"color:yellow;\">(3, 2, 2)<\/font>\n[[ 0  1]\n [ 2  3]\n [ 4  5]\n [ 6  7]\n [ 8  9]\n [10 11]]\n<font style=\"color:yellow;\">(6, 2)<\/font>\n<\/pre>\n    <!--\u3053\u3053\u307e\u3067-->\n    <\/div>\n<\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>3\u6b21\u5143\u30682\u6b21\u5143\u306endarray\uff08NumPy\u914d\u5217\uff09\u3092\u4f5c\u6210<\/li><li>np.arange(12)\u306e12\u500b\u306e\u6570\u5024\u30c7\u30fc\u30bf\u3092\u4f7f\u3063\u30662\u7a2e\u985e\u306e\u6b21\u5143\u306e\u30c7\u30fc\u30bf\u3092\u4f5c\u6210<\/li><li>a<ul><li>(3,2,2)<\/li><\/ul><ul><li>3\u6b21\u5143\u30c6\u30f3\u30bd\u30eb<\/li><\/ul><\/li><li>b<ul><li>(6,2)<\/li><\/ul><ul><li>2\u6b21\u5143\u30c6\u30f3\u30bd\u30eb\u306b\u5909\u63db<\/li><li>\u4f55\u3068\u306a\u304fb\u306e\u65b9\u304c\u8a08\u7b97\u3057\u3084\u3059\u305d\u3046\u306b\u898b\u3048\u307e\u305b\u3093\u304b\uff1f<\/li><\/ul><\/li><li>\u884c\u5217\u8a08\u7b97\u306b\u95a2\u4fc2\u3059\u308b\u306e\u306f\u6700\u5f8c\u306e\u6b21\u5143\u306a\u306e\u3067\u3001\u3069\u3061\u3089\u3082\u6700\u5f8c\u306e\u6b21\u5143\u306e\u8981\u7d20\u6570\u304c\u300c2\u300d\u306b\u306a\u308b\u3088\u3046\u306breshape<\/li><li>\u53c2\u8003<ul><li>reshape\u306b\u4f7f\u3063\u305f\u300c-1\u300d\u306e\u8aac\u660e\u8a18\u4e8b<\/li><li>\n<a class=\"movelink\" href=\"https:\/\/broaden-your-horizons.com\/ai-ss\/numpy\/shape-conversion\/#\u6b21\u5143\u524a\u9664\">reshape-4.\u6b21\u5143\u524a\u9664<\/a>\n<\/li><\/ul><\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">np.dot\u306b\u4f7f\u3046\u30c7\u30fc\u30bf<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">w = np.array([[2,3,1],[4,2,2]])\nprint(w)\nprint(w.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;\">[[2 3 1]\n [4 2 2]]\n(2, 3)\n<\/pre>\n\n\n\n<ul class=\"wp-block-list\"><li>dot\u7a4d\u3092\u884c\u3046\u30c7\u30fc\u30bf<\/li><li>\u5f62\u72b6(2,3)\u306endarray\uff08NumPy\u914d\u5217\uff09\u3092\u4f5c\u6210<ul><li>\u5f8c\u308d\u5074\u306e\u30c7\u30fc\u30bf\u306a\u306e\u3067\u3001\u6700\u521d\u306e\u6b21\u5143\u306e\u8981\u7d20\u6570\u304c\u300c2\u300d\u306b\u3059\u308b<\/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\">\u8a08\u7b97\u7d50\u679c\u3068\u78ba\u8a8d<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u305d\u308c\u305e\u308c\u3067np.dot\u8a08\u7b97<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">c = np.dot(a, w)\nd = np.dot(b, w)\nprint(c)\nprint(c.shape)\nprint(d)\nprint(d.shape)<\/code><\/pre>\n\n\n\n<div class=\"prev_box\" style=\"margin-top:30px\">\n    <input type=\"checkbox\" id=\"label1\">\n    <label for=\"label1\" style=\"user-select:none\">\u5168\u6587\u8868\u793a<\/label>\n    <div class=\"all_show\" for=\"label1\" style=\"margin-top:-15px\">\n    <!--\u975e\u8868\u793a\u3053\u3053\u304b\u3089-->\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;\">[[[ 4  2  2]\n  [16 12  8]]\n\n [[28 22 14]\n  [40 32 20]]\n\n [[52 42 26]\n  [64 52 32]]]\n(3, 2, 3)\n[[ 4  2  2]\n [16 12  8]\n [28 22 14]\n [40 32 20]\n [52 42 26]\n [64 52 32]]\n(6, 3)\n<\/pre>\n    <!--\u3053\u3053\u307e\u3067-->\n    <\/div>\n<\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5f62\u72b6\u306e\u78ba\u8a8d<ul><li>c<ul><li>a\u306e(3,2,2)\u304b\u3089(3,2,3)\u306b\u306a\u3063\u305f<\/li><\/ul><\/li><li>d<ul><li>(6,2)\u304b\u3089(6,3)\u306b\u306a\u3063\u305f<\/li><\/ul><\/li><\/ul><\/li><li>\u6570\u5024\u306e\u6bd4\u8f03<ul><li>\u4e2d\u8eab\u306e\u8a08\u7b97\u3055\u308c\u305f\u6570\u5b57\u306f\u540c\u3058<\/li><\/ul><\/li><li>\u5f62\u72b6\u306f\u7570\u306a\u308b\u304c\u3001\u4e2d\u8eab\uff08\u8a08\u7b97\u7d50\u679c\uff09\u304c\u540c\u3058\u3053\u3068\u304c\u5206\u304b\u308b<\/li><\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u3055\u3089\u306b\u30012\u6b21\u5143\u30923\u6b21\u5143\u306b\u623b\u3057\u3066\u6bd4\u8f03<\/h4>\n\n\n\n<pre class=\"wp-block-luxe-blocks-syntaxhighlighter line-numbers language-python\"><code class=\"language-python\">e = d.reshape(a.shape[0], a.shape[1], -1)\nprint(c)\nprint(c.shape)\nprint(e)\nprint(e.shape)<\/code><\/pre>\n\n\n\n<div class=\"prev_box\" style=\"margin-top:30px\">\n    <input type=\"checkbox\" id=\"label1\">\n    <label for=\"label1\" style=\"user-select:none\">\u5168\u6587\u8868\u793a<\/label>\n    <div class=\"all_show\" for=\"label1\" style=\"margin-top:-15px\">\n    <!--\u975e\u8868\u793a\u3053\u3053\u304b\u3089-->\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;\">[[[ 4  2  2]\n  [16 12  8]]\n\n [[28 22 14]\n  [40 32 20]]\n\n [[52 42 26]\n  [64 52 32]]]\n(3, 2, 3)\n[[[ 4  2  2]\n  [16 12  8]]\n\n [[28 22 14]\n  [40 32 20]]\n\n [[52 42 26]\n  [64 52 32]]]\n(3, 2, 3)\n<\/pre>\n    <!--\u3053\u3053\u307e\u3067-->\n    <\/div>\n<\/div>\n\n\n\n<ul class=\"wp-block-list\"><li>\u307e\u3063\u305f\u304f\u540c\u3058\u8a08\u7b97\u7d50\u679c<\/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\">\u307e\u3068\u3081<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>\u30bf\u30a4\u30c8\u30eb\u306b\u66f8\u3044\u305f\u306a\u305c\uff1f\u306b\u5bfe\u3059\u308b\u56de\u7b54<ul><li>\u9ad8\u901f\u5316\u306e\u305f\u3081<\/li><li>2\u6b21\u5143\u306e\u884c\u5217\u8a08\u7b97\u306b\u3057\u305f\u65b9\u304c\u51e6\u7406\u304c\u65e9\u3044\uff08GPU\u306e\u7279\u6027\u306b\u62e0\u308b\uff09<\/li><li>\u3057\u304b\u3057\u3001\u8a08\u7b97\u7d50\u679c\u304c\u5909\u308f\u3063\u3066\u3057\u307e\u3046\u3068\u554f\u984c<\/li><\/ul><\/li><li>\u8a08\u7b97\u7d50\u679c<ul><li>3\u6b21\u5143\u304b\u30892\u6b21\u5143\u306b\u5909\u63db<\/li><li>2\u6b21\u5143\u304b\u30893\u6b21\u5143\u306b\u623b\u3059<\/li><li>\u5909\u63db\u3057\u306a\u3044\u5834\u5408\u306e\u8a08\u7b97\u7d50\u679c\u3068\u4e00\u81f4\u3057\u305f<\/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","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b \u524d\u63d0 np.dot np.arange np.reshape \u30c6\u30f3\u30bd\u30eb \u4ee5\u4e0b\u306e\u30da\u30fc\u30b8\u306b\u8aac\u660e\u3042\u308a\uff08\u5916\u90e8\u30ea\u30f3\u30af\uff09 \u76ee\u6b21\u3078\uff1e\uff1e\u3000\u5148\u982d\u3078\uff1e\uff1e \u753b\u50cf\u51e6\u7406 \u6271\u3046\u30c7\u30fc\u30bf 3\u6b21\u5143\u4ee5\u4e0a\u306e\u591a\u6b21\u5143\u30c6\u30f3\u30bd\u30eb \u7573\u307f\u8fbc\u307f\u51e6\u7406\u306a\u3069\u3067\u91cd\u307f\u3068d 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