{"id":2048,"date":"2023-07-23T22:28:51","date_gmt":"2023-07-23T22:28:51","guid":{"rendered":"https:\/\/statorials.org\/ja\/%e3%83%8f%e3%82%9a%e3%83%b3%e3%82%bf%e3%82%99%e3%81%ae%e5%80%a4_%e6%95%b0\/"},"modified":"2023-07-23T22:28:51","modified_gmt":"2023-07-23T22:28:51","slug":"%e3%83%8f%e3%82%9a%e3%83%b3%e3%82%bf%e3%82%99%e3%81%ae%e5%80%a4_%e6%95%b0","status":"publish","type":"post","link":"https:\/\/statorials.org\/ja\/%e3%83%8f%e3%82%9a%e3%83%b3%e3%82%bf%e3%82%99%e3%81%ae%e5%80%a4_%e6%95%b0\/","title":{"rendered":"Pandas value_counts() \u95a2\u6570\u306e\u4f7f\u7528\u65b9\u6cd5 (\u4f8b\u4ed8\u304d)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\"><strong>value_counts()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001pandas \u30b7\u30ea\u30fc\u30ba\u306e\u4e00\u610f\u306e\u5024\u306e\u983b\u5ea6\u3092\u30ab\u30a6\u30f3\u30c8\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u3053\u306e\u95a2\u6570\u306f\u6b21\u306e\u57fa\u672c\u69cb\u6587\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> ()\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u4f8b\u306f\u3001\u3053\u306e\u69cb\u6587\u3092\u5b9f\u969b\u306b\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<h3><strong><span style=\"color: #000000;\"><span style=\"color: #000000;\">\u4f8b 1: \u56fa\u6709\u5024\u306e\u983b\u5ea6\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b<\/span><\/span><\/strong><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001pandas \u30b7\u30ea\u30fc\u30ba\u5185\u3067\u4e00\u610f\u306e\u5024\u306e\u51fa\u73fe\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><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#create pandas Series\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> ()\n\n3 4\n4 2\n7 2\n8 1\n9 1\ndtype: int64<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u3053\u308c\u306f\u6b21\u306e\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u5024 3 \u304c<strong>4<\/strong>\u56de\u51fa\u73fe\u3057\u307e\u3059\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u5024 4 \u304c<strong>2 \u56de<\/strong>\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u5024 7 \u304c<strong>2 \u56de<\/strong>\u8868\u793a\u3055\u308c\u307e\u3059\u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u7b49\u3005\u3002<\/span><\/p>\n<h3><strong><span style=\"color: #000000;\">\u4f8b2\uff1a\u4e00\u610f\u306e\u5024\uff08NaN\u3092\u542b\u3080\uff09\u306e\u983b\u5ea6\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b<\/span><\/strong><\/h3>\n<p><span style=\"color: #000000;\">\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001 <strong>value_counts()<\/strong>\u95a2\u6570\u306f NaN \u5024\u306e\u983b\u5ea6\u3092\u8868\u793a\u3057\u307e\u305b\u3093\u3002<\/span><\/p>\n<p><span style=\"color: #000000;\">\u305f\u3060\u3057\u3001 <strong>dropna<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001NaN \u5024\u306e\u983b\u5ea6\u3092\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\">#create pandas Series with some NaN values\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9, np.nan, np.nan])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series, including NaNs\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> (dropna= <span style=\"color: #008000;\">False<\/span> )\n\n3.0 4\n4.0 2\n7.0 2\nNaN2\n8.0 1\n9.0 1\ndtype: int64<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u4f8b 3: \u4e00\u610f\u306e\u5024\u306e\u76f8\u5bfe\u983b\u5ea6\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001 <strong>normalize<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001pandas \u30b7\u30ea\u30fc\u30ba\u306e\u4e00\u610f\u306e\u5024\u306e\u76f8\u5bfe\u983b\u5ea6\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><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#create pandas Series\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> (normalize= <span style=\"color: #008000;\">True<\/span> )\n\n3 0.4\n4 0.2\n7 0.2\n8 0.1\n9 0.1\ndtype:float64<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u3053\u308c\u306f\u6b21\u306e\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<ul>\n<li><span style=\"color: #000000;\">\u5024 3 \u306f\u3001\u7cfb\u5217\u5185\u306e\u3059\u3079\u3066\u306e\u5024\u306e<strong>40%<\/strong>\u3092\u8868\u3057\u307e\u3059\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u5024 4 \u306f\u3001\u7cfb\u5217\u5185\u306e\u3059\u3079\u3066\u306e\u5024\u306e<strong>20%<\/strong>\u3092\u8868\u3057\u307e\u3059\u3002<\/span><\/li>\n<li><span style=\"color: #000000;\">\u5024 7 \u306f\u3001\u7cfb\u5217\u5185\u306e\u3059\u3079\u3066\u306e\u5024\u306e<strong>20%<\/strong>\u3092\u8868\u3057\u307e\u3059\u3002<\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">\u7b49\u3005\u3002<\/span><\/p>\n<h3><strong>\u4f8b 4: \u30d3\u30f3\u5185\u306e\u983b\u5ea6\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b<\/strong><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30b3\u30fc\u30c9\u306f\u3001 <strong>bins<\/strong>\u5f15\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u540c\u3058\u30b5\u30a4\u30ba\u306e\u30d3\u30f3\u306b\u5206\u985e\u3055\u308c\u308b pandas \u30b7\u30ea\u30fc\u30ba\u5185\u306e\u5024\u306e\u983b\u5ea6\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><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#create pandas Series\n<\/span>my_series = pd. <span style=\"color: #3366ff;\">Series<\/span> ([3, 3, 3, 3, 4, 4, 7, 7, 8, 9])\n\n<span style=\"color: #008080;\">#count occurrences of unique values in Series\n<\/span>my_series. <span style=\"color: #3366ff;\">value_counts<\/span> (bins= <span style=\"color: #008000;\">3<\/span> )\n\n(3.0, 5.0] 6\n(5.0, 7.0] 2\n(7.0, 9.0] 2\ndtype: int64\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u3053\u308c\u306f\u6b21\u306e\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">3\u30685\u306e\u9593\u306b\u306f<strong>6\u3064\u306e<\/strong>\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\">5\u30687\u306e\u9593\u306b\u306f<strong>2\u3064\u306e<\/strong>\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/li>\n<li> <span style=\"color: #000000;\">7\u30689\u306e\u9593\u306b\u306f<strong>2\u3064\u306e<\/strong>\u5024\u304c\u3042\u308a\u307e\u3059\u3002<\/span><\/li>\n<\/ul>\n<h3><strong><span style=\"color: #000000;\">\u4f8b 5: Pandas DataFrame \u306e\u5024\u306e\u983b\u5ea6\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b<\/span><\/strong><\/h3>\n<p><span style=\"color: #000000;\"><strong>value_counts()<\/strong>\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001\u30d1\u30f3\u30c0 \u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306e\u7279\u5b9a\u306e\u5217\u306e\u4e00\u610f\u306e\u5024\u306e\u983b\u5ea6\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><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;\">points<\/span> ': [9, 9, 9, 10, 10, 13, 15, 22],\n                   ' <span style=\"color: #ff0000;\">assists<\/span> ': [5, 7, 7, 9, 12, 9, 9, 4],\n                   ' <span style=\"color: #ff0000;\">rebounds<\/span> ': [11, 8, 10, 6, 6, 5, 9, 12]})\n<span style=\"color: #008080;\">#count occurrences of unique values in 'points' column\n<\/span>df[' <span style=\"color: #ff0000;\">points<\/span> ']. <span style=\"color: #3366ff;\">value_counts<\/span> ()\n\n9 3\n10 2\n13 1\n15 1\n22 1\nName: points, dtype: int64<\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u8ffd\u52a0\u30ea\u30bd\u30fc\u30b9<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u6b21\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001\u30d1\u30f3\u30c0\u3067\u4ed6\u306e\u4e00\u822c\u7684\u306a\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/ja\/\u30cf\u309a\u30f3\u30bf\u3099\u304b\u3099\u8aac\u660e\u3057\u307e\u3059\/\" target=\"_blank\" rel=\"noopener\">Pandas\u3067describe()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/-10\/\" target=\"_blank\" rel=\"noopener\">Pandas \u3067\u884c\u6570\u3092\u30ab\u30a6\u30f3\u30c8\u3059\u308b\u65b9\u6cd5<\/a><br \/><a href=\"https:\/\/statorials.org\/ja\/\u756a\u53f7\u3053\u3099\u3068\u306e\u30cf\u309a\u30f3\u30bf\u3099\u306e\u30af\u3099\u30eb\u30fc\u30d5\u309a\/\" target=\"_blank\" rel=\"noopener\">\u30d1\u30f3\u30c0\u306e\u96c6\u56e3\u76ee\u6483\u6570\u3092\u6570\u3048\u308b\u65b9\u6cd5<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>value_counts()\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3001pandas \u30b7\u30ea\u30fc\u30ba\u306e\u4e00\u610f\u306e\u5024\u306e\u983b\u5ea6\u3092\u30ab\u30a6\u30f3\u30c8\u3067\u304d\u307e\u3059\u3002 \u3053\u306e\u95a2\u6570\u306f\u6b21\u306e\u57fa\u672c\u69cb\u6587\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002 my_series. value_counts () \u6b21\u306e\u4f8b\u306f\u3001\u3053\u306e\u69cb\u6587\u3092\u5b9f\u969b [&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-2048","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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