{"id":1648,"date":"2023-07-25T12:40:45","date_gmt":"2023-07-25T12:40:45","guid":{"rendered":"https:\/\/statorials.org\/ja\/%e3%83%8f%e3%82%9a%e3%82%a4%e3%82%bd%e3%83%b3%e4%bc%af%e7%88%b5\/"},"modified":"2023-07-25T12:40:45","modified_gmt":"2023-07-25T12:40:45","slug":"%e3%83%8f%e3%82%9a%e3%82%a4%e3%82%bd%e3%83%b3%e4%bc%af%e7%88%b5","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/%e3%83%8f%e3%82%9a%e3%82%a4%e3%82%bd%e3%83%b3%e4%bc%af%e7%88%b5\/","title":{"rendered":"Python \u3067 countif \u95a2\u6570\u3092\u5b9f\u884c\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u591a\u304f\u306e\u5834\u5408\u3001\u7279\u5b9a\u306e\u57fa\u6e96\u3092\u6e80\u305f\u3059 pandas DataFrame \u5185\u306e\u884c\u6570\u306e\u307f\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u305f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u5e78\u3044\u306a\u3053\u3068\u306b\u3001\u3053\u308c\u306f\u6b21\u306e\u57fa\u672c\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u7c21\u5358\u306b\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum(df. <span style=\"color: #3366ff;\">column_name<\/span> == <span style=\"color: #008000;\">some_value<\/span> )\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u4f8b\u306f\u3001\u3053\u306e\u69cb\u6587\u3092\u6b21\u306e\u30c7\u30fc\u30bf \u30d5\u30ec\u30fc\u30e0\u3067\u5b9f\u969b\u306b\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><b><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#createDataFrame\n<\/span>df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">x<\/span> ': [3, 4, 5, 6, 7, 8, 9, 10, 10, 12, 13],\n                   ' <span style=\"color: #ff0000;\">y<\/span> ': [3, 4, 5, 7, 9, 13, 15, 19, 23, 24, 29]})\n\n<span style=\"color: #008080;\">#view head of DataFrame\n<\/span>df. <span style=\"color: #3366ff;\">head<\/span> ()\n\nx y\n0 3 3\n1 4 4\n2 5 5\n3 6 7\n4 7 9\n<\/b><\/span><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u4f8b 1: \u7279\u5b9a\u306e\u5024\u306b\u7b49\u3057\u3044\u884c\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001\u5909\u6570 x \u304c 10 \u306b\u7b49\u3057\u3044\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum( <span style=\"color: #3366ff;\">df.x<\/span> == <span style=\"color: #008000;\">10<\/span> )\n\n2\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001\u5909\u6570 x \u304c 10 \u306b\u7b49\u3057\u3044<em>\u3001\u307e\u305f\u306f<\/em>\u5909\u6570 y \u304c 5 \u306b\u7b49\u3057\u3044\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum((df. <span style=\"color: #3366ff;\">x<\/span> == <span style=\"color: #008000;\">10<\/span> ) | (df. <span style=\"color: #3366ff;\">y<\/span> == <span style=\"color: #008000;\">5<\/span> ))\n\n3<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001\u5909\u6570 x \u304c 10 \u306b<em>\u7b49\u3057\u304f\u306a\u3044<\/em>\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum( <span style=\"color: #3366ff;\">df.x<\/span> != <span style=\"color: #008000;\">10<\/span> )\n\n9<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u4f8b 2: \u7279\u5b9a\u306e\u5024\u4ee5\u4e0a\u306e\u884c\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001x \u304c 10 \u3088\u308a\u5927\u304d\u3044\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum( <span style=\"color: #3366ff;\">df.x<\/span> &gt; <span style=\"color: #008000;\">10<\/span> ) \n\n2<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001x \u304c 7 \u4ee5\u4e0b\u306e\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum(df. <span style=\"color: #3366ff;\">x<\/span> &lt;= <span style=\"color: #008000;\">7<\/span> )\n \n5<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u4f8b 3: 2 \u3064\u306e\u5024\u306e\u9593\u306e\u884c\u3092\u6570\u3048\u308b<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001x \u304c 10 \uff5e 20 \u306e\u7bc4\u56f2\u306e\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sum((df. <span style=\"color: #3366ff;\">x<\/span> &gt;= <span style=\"color: #008000;\">5<\/span> ) &amp; (df. <span style=\"color: #3366ff;\">x<\/span> &lt;= <span style=\"color: #008000;\">10<\/span> ))\n\n7<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/strong><\/span><\/h3>\n<p><a href=\"https:\/\/statorials.org\/ja\/\u30cf\u309a\u30f3\u30bf\u3099\u306e\u884c\u9593\u306e\u9055\u3044\/\" target=\"_blank\" rel=\"noopener\">\u30d1\u30f3\u30c0: 2 \u3064\u306e\u7dda\u306e\u9055\u3044\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/\u30cf\u309a\u30f3\u30bf\u3099\u306f\u6587\u5b57\u5217\u3092\u542b\u3080\u884c\u3092\u524a\u9664\u3057\u307e\u3059\/\" target=\"_blank\" rel=\"noopener\">Pandas: \u7279\u5b9a\u306e\u6587\u5b57\u5217\u3092\u542b\u3080\u884c\u3092\u524a\u9664\u3059\u308b\u65b9\u6cd5<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/\u30cf\u309a\u30f3\u30bf\u3099\u306f\u91cd\u8907\u3092\u30c8\u3099\u30ed\u30c3\u30d5\u309a\u3057\u307e\u3059\/\" target=\"_blank\" rel=\"noopener\">\u30d1\u30f3\u30c0: DataFrame \u5185\u306e\u91cd\u8907\u884c\u3092\u524a\u9664\u3059\u308b\u65b9\u6cd5<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u591a\u304f\u306e\u5834\u5408\u3001\u7279\u5b9a\u306e\u57fa\u6e96\u3092\u6e80\u305f\u3059 pandas DataFrame \u5185\u306e\u884c\u6570\u306e\u307f\u3092\u30ab\u30a6\u30f3\u30c8\u3057\u305f\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002 \u5e78\u3044\u306a\u3053\u3068\u306b\u3001\u3053\u308c\u306f\u6b21\u306e\u57fa\u672c\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u7c21\u5358\u306b\u5b9f\u884c\u3067\u304d\u307e\u3059\u3002 sum(df. column_name == [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-1648","post","type-post","status-publish","format-standard","hentry","category-16"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - 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