{"id":8578,"date":"2026-06-04T12:52:17","date_gmt":"2026-06-04T03:52:17","guid":{"rendered":"https:\/\/since2020.jp\/media\/?p=8578"},"modified":"2026-06-04T12:52:17","modified_gmt":"2026-06-04T03:52:17","slug":"time-series-feature-engineering","status":"publish","type":"post","link":"https:\/\/since2020.jp\/media\/time-series-feature-engineering\/","title":{"rendered":"\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u7279\u5fb4\u91cf\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306e\u57fa\u672c"},"content":{"rendered":"\n<h2 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class=\"wp-block-heading\">\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3068\u306f\u4f55\u304b\uff1f<\/h2>\n\n\n\n<p>\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3068\u306f\u3001\u65e5\u6642\u306a\u3069\u306e\u6642\u9593\u306e\u60c5\u5831\u304c\u3064\u3044\u305f\u30c6\u30fc\u30d6\u30eb\u306e\u3053\u3068\u3067\u3059\u30021\u30641\u3064\u306e\u30ec\u30b3\u30fc\u30c9\u304c\u3001\u3042\u308b\u6642\u70b9\u3068\u7d50\u3073\u3064\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6642\u9593\u306e\u5358\u4f4d\u306f\u30c7\u30fc\u30bf\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u3001\u65e5\u5358\u4f4d\u306e\u3053\u3068\u3082\u3042\u308c\u3070\u5206\u5358\u4f4d\u306e\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u30ec\u30b3\u30fc\u30c9\u306e\u9593\u9694\u3082\u69d8\u3005\u3067\u3001\u6bce\u65e5\u304d\u308c\u3044\u306b\u4e26\u3093\u3067\u3044\u308b\u7b49\u9593\u9694\u306e\u3082\u306e\u3082\u3042\u308c\u3070\u3001\u65e5\u4ed8\u304c\u98db\u3093\u3067\u3044\u308b\u3082\u306e\u3082\u3042\u308a\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u30af\u30ec\u30b8\u30c3\u30c8\u30ab\u30fc\u30c9\u306e\u5229\u7528\u5c65\u6b74\u3092\u8003\u3048\u3066\u307f\u307e\u3059\u3002\u5229\u7528\u3057\u305f\u65e5\u3054\u3068\u306b\u3001\u304a\u5e97\u306e\u540d\u524d\u3068\u91d1\u984d\u304c\u8a18\u9332\u3055\u308c\u3066\u3044\u308b\u3068\u3057\u307e\u3059\u3002\u3053\u306e\u5834\u5408\u3001\u6642\u9593\u306e\u5358\u4f4d\u306f\u300c\u65e5\u300d\u3067\u3001\u4f7f\u3063\u305f\u65e5\u306b\u3057\u304b\u8a18\u9332\u304c\u6b8b\u3089\u306a\u3044\u306e\u3067\u3001\u9593\u9694\u306f\u98db\u3073\u98db\u3073\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u6642\u9593\u306e\u60c5\u5831\u304c\u76f4\u63a5\u306a\u304f\u3066\u3082\u3001\u9806\u756a\u306b\u610f\u5473\u304c\u3042\u308b\u9805\u76ee\u304c\u3042\u308c\u3070\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3068\u3057\u3066\u6271\u3048\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u3042\u308b\u5e97\u8217\u306e\u6765\u5e97\u5c65\u6b74\u306b\u300c\u7d2f\u7a4d\u6765\u5e97\u56de\u6570\u300d\u304c\u5165\u3063\u3066\u3044\u308b\u3068\u3057\u307e\u3059\u3002\u3053\u306e1\u56de\u76ee\u30fb2\u56de\u76ee\u2026\u3068\u3044\u3046\u6570\u5b57\u306f\u6765\u5e97\u3057\u305f\u9806\u756a\u305d\u306e\u3082\u306e\u306a\u306e\u3067\u3001\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3068\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3055\u3089\u306b\u3001\u9806\u756a\u3092\u8868\u3059\u9805\u76ee\u3059\u3089\u306a\u304f\u3066\u3082\u3001\u30ec\u30b3\u30fc\u30c9\u306e\u4e26\u3073\u81ea\u4f53\u306b\u9806\u756a\u306e\u610f\u5473\u304c\u3042\u308c\u3070\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u8cb7\u3044\u7269\u306e\u305f\u3073\u306b\u4e0b\u30781\u884c\u305a\u3064\u8ffd\u52a0\u3055\u308c\u3066\u3044\u304f\u30c6\u30fc\u30d6\u30eb\u304c\u305d\u3046\u3067\u3059\u3002\u300c\u3071\u3063\u3068\u898b\u3067\u306f\u5206\u304b\u3089\u306a\u3044\u3051\u3069\u3001\u3088\u304f\u898b\u308b\u3068\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3060\u3063\u305f\u300d\u3068\u3044\u3046\u3053\u3068\u3082\u3042\u308b\u306e\u3067\u3001\u6ce8\u610f\u3057\u3066\u898b\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3067\u306f\u3001\u3053\u306e\u30ec\u30b3\u30fc\u30c9\u306e\u9806\u756a\u3092\u6d3b\u304b\u3057\u3066\u3001\u6b21\u306e3\u3064\u306e\u7279\u5fb4\u91cf\u3092\u4f5c\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u30e9\u30b0\u7279\u5fb4\u91cf<\/li>\n\n\n\n<li>\u30a6\u30a3\u30f3\u30c9\u30a6\u7279\u5fb4\u91cf<\/li>\n\n\n\n<li>\u7d2f\u7a4d\u7279\u5fb4\u91cf<\/li>\n<\/ul>\n\n\n\n<p>\u3053\u3053\u304b\u3089\u9806\u756a\u306b\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u30e9\u30b0\u7279\u5fb4\u91cf<\/h2>\n\n\n\n<p>\u30e9\u30b0\u7279\u5fb4\u91cf\u306f\u3001\u3042\u308b\u5217\u306e\u5024\u30921\u3064\u524d\u306e\u6642\u70b9\u3078\u305a\u3089\u3057\u3066\u4f5c\u308b\u7279\u5fb4\u91cf\u3067\u3059\u3002\u300c1\u3064\u524d\u300d\u3060\u3051\u3067\u306a\u304f\u30012\u3064\u524d\u30843\u3064\u524d\u3078\u305a\u3089\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3057\u3001\u9006\u306b\u5f8c\u308d\uff08\u672a\u6765\u5074\uff09\u3078\u305a\u3089\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u6570\u5024\u306e\u5217\u306a\u3089\u3001\u305a\u3089\u3057\u305f\u5024\u3068\u5143\u306e\u5024\u306e\u5dee\u3092\u53d6\u3063\u3066\u300c\u5dee\u5206\u300d\u3092\u7279\u5fb4\u91cf\u306b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u3092\u4f5c\u3063\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u4f8b1\uff1a1\u884c\u305a\u3089\u3059<\/strong><\/p>\n\n\n\n<p>\u65e5\u5358\u4f4d\u306e\u5929\u6c17\u30c7\u30fc\u30bf\u3067\u8003\u3048\u307e\u3059\u3002\u3084\u308b\u3053\u3068\u306f\u30b7\u30f3\u30d7\u30eb\u3067\u3001\u300c\u5929\u6c17\u300d\u306e\u5217\u30921\u65e5\u5206\u305a\u3089\u3059\u3060\u3051\u3067\u3059\u3002\u3053\u308c\u3067\u300c\u524d\u65e5\u306e\u5929\u6c17\u300d\u3068\u3044\u3046\u7279\u5fb4\u91cf\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u305a\u3089\u3059\u3068\u304d\u306b\u6c17\u3092\u3064\u3051\u305f\u3044\u3053\u3068\u304c2\u3064\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>1\u3064\u76ee\u306f\u3001\u6b20\u640d\u304c\u51fa\u308b\u3053\u3068\u3067\u3059\u30021\u65e5\u305a\u3089\u3059\u3068\u5148\u982d\u306e1\u884c\u304c\u7a7a\u306b\u306a\u308a\u307e\u3059\u30022\u65e5\u305a\u3089\u305b\u30701\u884c\u76ee\u30682\u884c\u76ee\u304c\u7a7a\u304d\u307e\u3059\u3002\u7a7a\u3044\u305f\u307e\u307e\u306b\u3059\u308b\u304b\u3001\u4f55\u304b\u3067\u57cb\u3081\u308b\u304b\u306f\u3001\u305d\u306e\u90fd\u5ea6\u6c7a\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>2\u3064\u76ee\u306f\u3001\u30c7\u30fc\u30bf\u304c\u4e0a\u304b\u3089\u6642\u9593\u9806\u306b\u4e26\u3093\u3067\u3044\u308b\u524d\u63d0\u3067\u51e6\u7406\u3055\u308c\u308b\u70b9\u3067\u3059\u3002\u4e26\u3073\u9806\u304c\u30d0\u30e9\u30d0\u30e9\u3060\u3068\u6b63\u3057\u304f\u305a\u308c\u306a\u3044\u306e\u3067\u3001\u5148\u306b\u4e26\u3079\u66ff\u3048\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e26\u3093\u3067\u3044\u306a\u3044\u3068\u304d\u306f <code>df = df.sort_values(\"date\")<\/code> \u306e\u3088\u3046\u306b\u30bd\u30fc\u30c8\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df1 = pd.DataFrame({\"date\":pd.date_range(\"2021-01-01\",\"2021-01-10\"),\n                    \"weather\":&#091;\"\u6674\u308c\",\"\u6674\u308c\",\"\u96e8\",\"\u66c7\u308a\",\"\u66c7\u308a\",\"\u6674\u308c\",\"\u96e8\",\n                               \"\u6674\u308c\",\"\u6674\u308c\",\"\u6674\u308c\"],})\ndf1&#091;\"weather_shift1\"] = df1&#091;\"weather\"].shift(1)\ndf1<\/code><\/pre>\n\n\n\n<p>\u51fa\u529b\u7d50\u679c<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"286\" height=\"349\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image.png\" alt=\"\" class=\"wp-image-8579\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image.png 286w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-246x300.png 246w\" sizes=\"(max-width: 286px) 100vw, 286px\" \/><\/figure>\n<\/div>\n\n\n<p><strong>\u4f8b2\uff1aID\u3054\u3068\u306b1\u884c\u305a\u3089\u3059<\/strong><\/p>\n\n\n\n<p>\u4f1a\u54e1ID\u3054\u3068\u306b\u3001\u8cfc\u5165\u65e5\u3068\u8cfc\u5165\u91d1\u984d\u304c\u5165\u3063\u305f\u30c6\u30fc\u30d6\u30eb\u3092\u8003\u3048\u307e\u3059\u3002\u4f1a\u54e1ID\u3054\u3068\u306b1\u884c\u305a\u3089\u3057\u3066\u3001\u300c\u524d\u56de\u3044\u304f\u3089\u4f7f\u3063\u305f\u304b\uff08\u524d\u56de\u8cfc\u5165\u91d1\u984d\uff09\u300d\u3068\u3044\u3046\u7279\u5fb4\u91cf\u3092\u4f5c\u308a\u307e\u3059\u3002\u4eca\u56de\u306f\u4f1a\u54e1ID\u3054\u3068\u306b\u305a\u3089\u3059\u306e\u3067\u3001\u5404ID\u306e\u5148\u982d1\u884c\u304c\u6b20\u640d\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df2 = pd.DataFrame({\"id\":&#091;\"A\"]*3 + &#091;\"B\"]*2 + &#091;\"C\"]*4,\n                    \"date\":&#091;\"2021-04-02\",\"2021-04-10\",\"2021-04-25\",\n                            \"2021-04-18\",\"2021-04-19\",\n                            \"2021-04-01\",\"2021-04-04\",\"2021-04-09\",\n                            \"2021-04-12\",],\n                    \"money\":&#091;1000,2000,900,4000,1800,900,1200,1100,2900],})\ndf2&#091;\"date\"] = pd.to_datetime(df2&#091;\"date\"], format=\"%Y-%m-%d\")\ndf2&#091;\"money_shift1\"] = df2.groupby(\"id\")&#091;\"money\"].shift(1)\ndf2<\/code><\/pre>\n\n\n\n<p>\u51fa\u529b\u7d50\u679c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"287\" height=\"322\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-1.png\" alt=\"\" class=\"wp-image-8580\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-1.png 287w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-1-267x300.png 267w\" sizes=\"(max-width: 287px) 100vw, 287px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u30a6\u30a3\u30f3\u30c9\u30a6\u7279\u5fb4\u91cf<\/h2>\n\n\n\n<p>\u30a6\u30a3\u30f3\u30c9\u30a6\u7279\u5fb4\u91cf\u306f\u3001\u3056\u3063\u304f\u308a\u8a00\u3046\u3068\u300c\u79fb\u52d5\u5e73\u5747\u300d\u306e\u3053\u3068\u3067\u3059\u3002\u305f\u3060\u3001\u8a08\u7b97\u3059\u308b\u306e\u306f\u5e73\u5747\u3060\u3051\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u6a19\u6e96\u504f\u5dee\u3084\u6700\u5927\u5024\u3001\u6700\u5c0f\u5024\u3092\u4f7f\u3046\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u305d\u308c\u3089\u3092\u307e\u3068\u3081\u3066\u30a6\u30a3\u30f3\u30c9\u30a6\u7279\u5fb4\u91cf\u3068\u547c\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u300c\u30a6\u30a3\u30f3\u30c9\u30a6\u300d\u306f\u3001\u305d\u306e\u884c\u81ea\u8eab\u3092\u542b\u3081\u3066\u4f55\u500b\u5206\u306e\u30c7\u30fc\u30bf\u3092\u4f7f\u3046\u304b\u3092\u8868\u3057\u307e\u3059\u3002\u5e45\u30923\u306b\u3059\u308b\u3068\u3001\u81ea\u5206\u306e\u884c\u30fb1\u3064\u524d\u30fb2\u3064\u524d\u306e\u5408\u308f\u305b\u30663\u500b\u5206\u304c\u8a08\u7b97\u306e\u5bfe\u8c61\u306b\u306a\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u30a6\u30a3\u30f3\u30c9\u30a6\u5e453\u306e\u79fb\u52d5\u5e73\u5747\u306a\u3089\u3001\u3053\u306e3\u500b\u306e\u5024\u306e\u5e73\u5747\u304c\u7279\u5fb4\u91cf\u306b\u306a\u308a\u307e\u3059\u3002\u5177\u4f53\u7684\u306a\u4f5c\u308a\u65b9\u3092\u4f8b\u3067\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p><strong>\u4f8b1\uff1a\u30a6\u30a3\u30f3\u30c9\u30a6\u5e453\u65e5<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df3 = pd.DataFrame({\"date\":pd.date_range(\"2021-01-01\",\"2021-01-10\"),\n                    \"temperature\":&#091;8,10,12,11,9,10,12,7,9,10],})\ndf3&#091;\"temperature_window3\"] = df3&#091;\"temperature\"].rolling(window=3).mean()\ndf3<\/code><\/pre>\n\n\n\n<p>\u51fa\u529b\u7d50\u679c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"348\" height=\"345\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-2.png\" alt=\"\" class=\"wp-image-8581\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-2.png 348w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-2-300x297.png 300w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-2-150x150.png 150w\" sizes=\"(max-width: 348px) 100vw, 348px\" \/><\/figure>\n\n\n\n<p><strong>\u4f8b2\uff1aID\u3054\u3068\u306e\u30a6\u30a3\u30f3\u30c9\u30a6<\/strong><\/p>\n\n\n\n<p>\u30e9\u30b0\u7279\u5fb4\u91cf\u306e\u4f8b2\u3068\u540c\u3058\u30c6\u30fc\u30d6\u30eb\u3092\u4f7f\u3044\u307e\u3059\u3002\u3053\u3053\u3067\u306f\u4f1a\u54e1ID\u3054\u3068\u306b\u30a6\u30a3\u30f3\u30c9\u30a6\u5e45\u30922\u306b\u3057\u3066\u3001\u76f4\u8fd12\u56de\u306e\u8cfc\u5165\u91d1\u984d\u306e\u5e73\u5747\u3092\u7279\u5fb4\u91cf\u306b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df4 = pd.DataFrame({\"id\":&#091;\"A\"]*3 + &#091;\"B\"]*2 + &#091;\"C\"]*4,\n                    \"date\":&#091;\"2021-04-02\",\"2021-04-10\",\"2021-04-25\",\n                            \"2021-04-18\",\"2021-04-19\",\n                            \"2021-04-01\",\"2021-04-04\",\"2021-04-09\",\n                            \"2021-04-12\",],\n                    \"money\":&#091;1000,2000,900,4000,1800,900,1200,1100,2900],})\ndf4&#091;\"date\"] = pd.to_datetime(df4&#091;\"date\"], format=\"%Y-%m-%d\")\ndf4&#091;\"money_shift1\"] = df4.groupby(\"id\")&#091;\"money\"].transform(lambda x: x.rolling(window=2).mean())\ndf4<\/code><\/pre>\n\n\n\n<p>\u51fa\u529b\u7d50\u679c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"286\" height=\"322\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-3.png\" alt=\"\" class=\"wp-image-8582\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-3.png 286w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-3-266x300.png 266w\" sizes=\"(max-width: 286px) 100vw, 286px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u7d2f\u7a4d\u7279\u5fb4\u91cf<\/h2>\n\n\n\n<p>\u7d2f\u7a4d\u7279\u5fb4\u91cf\u306f\u3001\u904e\u53bb\u306e\u5024\u3092\u8db3\u3057\u5408\u308f\u305b\u3066\u3044\u3063\u305f\u6570\u5024\u3092\u7279\u5fb4\u91cf\u306b\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p><strong>\u4f8b1\uff1a\u7d2f\u7a4d\u306e\u5408\u8a08<\/strong><\/p>\n\n\n\n<p>\u96e8\u304c\u964d\u3063\u305f\u65e5\u306b\u300c1\u300d\u3092\u7acb\u3066\u305f\u3001\u65e5\u5358\u4f4d\u306e\u30c6\u30fc\u30d6\u30eb\u3067\u8003\u3048\u307e\u3059\u3002\u300c\u3053\u308c\u307e\u3067\u306b\u4f55\u65e5\u96e8\u304c\u964d\u3063\u305f\u304b\u300d\u3092\u7279\u5fb4\u91cf\u306b\u3057\u305f\u3044\u3068\u304d\u306f\u3001\u96e8\u30d5\u30e9\u30b0\u306e\u6570\u5b57\u3092\u9806\u756a\u306b\u8db3\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u306e\u8db3\u3057\u5408\u308f\u305b\u306f <code>cumsum<\/code> \u3067\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df5 = pd.DataFrame({\"date\":pd.date_range(\"2021-01-01\",\"2021-01-10\"),\n                    \"flag_rain\":&#091;0,0,1,0,0,0,1,0,0,0],})\ndf5&#091;\"flag_rain_cumsum\"] = df5&#091;\"flag_rain\"].cumsum()\ndf5<\/code><\/pre>\n\n\n\n<p>\u51fa\u529b\u7d50\u679c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"312\" height=\"349\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-4.png\" alt=\"\" class=\"wp-image-8583\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-4.png 312w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-4-268x300.png 268w\" sizes=\"(max-width: 312px) 100vw, 312px\" \/><\/figure>\n\n\n\n<p><strong>\u4f8b2\uff1aID\u3054\u3068\u306e\u7d2f\u7a4d<\/strong><\/p>\n\n\n\n<p>\u4f1a\u54e1ID\u3054\u3068\u306b\u3001\u8cfc\u5165\u91d1\u984d\u3092\u9806\u756a\u306b\u8db3\u3057\u5408\u308f\u305b\u3066\u3044\u304d\u307e\u3059\u3002ID\u3054\u3068\u306b <code>cumsum<\/code> \u3092\u4f7f\u3044\u305f\u3044\u306e\u3067\u3001<code>groupby<\/code> \u3068\u7d44\u307f\u5408\u308f\u305b\u307e\u3059<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>df6 = pd.DataFrame({\"id\":&#091;\"A\"]*3 + &#091;\"B\"]*2 + &#091;\"C\"]*4,\n                    \"date\":&#091;\"2021-04-02\",\"2021-04-10\",\"2021-04-25\",\n                            \"2021-04-18\",\"2021-04-19\",\n                            \"2021-04-01\",\"2021-04-04\",\"2021-04-09\",\n                            \"2021-04-12\",],\n                    \"money\":&#091;1000,2000,900,4000,1800,900,1200,1100,2900],})\ndf6&#091;\"date\"] = pd.to_datetime(df6&#091;\"date\"], format=\"%Y-%m-%d\")\ndf6&#091;\"money_cumsum\"] = df6.groupby(\"id\")&#091;\"money\"].cumsum()\ndf6<\/code><\/pre>\n\n\n\n<p>\u51fa\u529b\u7d50\u679c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"283\" height=\"320\" src=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-5.png\" alt=\"\" class=\"wp-image-8584\" srcset=\"https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-5.png 283w, https:\/\/since2020.jp\/media\/wp-content\/uploads\/2026\/06\/image-5-265x300.png 265w\" sizes=\"(max-width: 283px) 100vw, 283px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u306e\u7279\u5fb4\u91cf\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306e\u57fa\u672c\u3068\u3057\u3066\u3001\u30e9\u30b0\u7279\u5fb4\u91cf\u30fb\u30a6\u30a3\u30f3\u30c9\u30a6\u7279\u5fb4\u91cf\u30fb\u7d2f\u7a4d\u7279\u5fb4\u91cf\u306e3\u3064\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p>\u3053\u308c\u3089\u306e\u7279\u5fb4\u91cf\u306f\u4e88\u6e2c\u7cbe\u5ea6\u3092\u4e0a\u3052\u3066\u304f\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u304c\u3001\u3044\u3064\u3067\u3082\u52b9\u304f\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u3001\u9006\u306b\u7cbe\u5ea6\u3092\u4e0b\u3052\u3066\u3057\u307e\u3046\u3053\u3068\u3082\u3042\u308a\u307e\u3059\u3002\u5927\u4e8b\u306a\u306e\u306f\u300c\u306a\u305c\u3053\u306e\u7279\u5fb4\u91cf\u304c\u4e88\u6e2c\u306b\u52b9\u304d\u305d\u3046\u306a\u306e\u304b\u300d\u3092\u81ea\u5206\u306e\u8a00\u8449\u3067\u8aac\u660e\u3067\u304d\u308b\u304b\u3069\u3046\u304b\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u3067\u306f\u3001\u3053\u3053\u3067\u7d39\u4ecb\u3057\u305f\u5f62\u3092\u305d\u306e\u307e\u307e\u4f7f\u3046\u3060\u3051\u3067\u306a\u304f\u3001\u5c11\u3057\u5909\u3048\u3066\u307f\u305f\u308a\u3001\u7d44\u307f\u5408\u308f\u305b\u3066\u307f\u305f\u308a\u3001\u52b9\u304b\u306a\u305d\u3046\u306a\u3082\u306e\u306f\u601d\u3044\u5207\u3063\u3066\u5916\u3057\u305f\u308a\u3057\u306a\u304c\u3089\u3001\u8a66\u3057\u3066\u3044\u304f\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002\u4e88\u6e2c\u3057\u305f\u3044\u5bfe\u8c61\u3068\u306b\u3089\u3081\u3063\u3053\u3057\u306a\u304c\u3089\u3001\u81ea\u5206\u306a\u308a\u306e\u7279\u5fb4\u91cf\u3092\u898b\u3064\u3051\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>\u53c2\u8003\uff1aKaggle\u3067\u78e8\u304f\u6a5f\u68b0\u5b66\u7fd2\u306e\u5b9f\u8df5\u529b\u3000\u8af8\u6a4b\u653f\u5e78<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b \u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u306b\u306f\u3001\u666e\u901a\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u306f\u306a\u3044\u300c\u9806\u5e8f\u300d\u3068\u3044\u3046\u60c5\u5831\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u9806\u5e8f\u3092\u3046\u307e\u304f\u4f7f\u3046\u3068\u3001\u4e88\u6e2c\u30e2\u30c7\u30eb\u306e\u7cbe\u5ea6\u30a2\u30c3\u30d7\u306b\u5f79\u7acb\u3064\u7279\u5fb4\u91cf\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 \u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3068\u306f\u4f55\u304b\uff1f \u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u3068\u306f\u3001\u65e5\u6642\u306a\u3069\u306e\u6642\u9593 [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":8575,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","swell_btn_cv_data":"","footnotes":"","_wp_rev_ctl_limit":""},"categories":[1251],"tags":[96,419,355],"class_list":["post-8578","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-data-analysis","tag-ai","tag-419","tag-355"],"_links":{"self":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/8578","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/comments?post=8578"}],"version-history":[{"count":1,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/8578\/revisions"}],"predecessor-version":[{"id":8585,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/posts\/8578\/revisions\/8585"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media\/8575"}],"wp:attachment":[{"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/media?parent=8578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/categories?post=8578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/since2020.jp\/media\/wp-json\/wp\/v2\/tags?post=8578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}