{"id":5019,"date":"2022-10-18T23:27:07","date_gmt":"2022-10-18T14:27:07","guid":{"rendered":"https:\/\/obenkyolab.com\/?p=5019"},"modified":"2022-10-18T23:27:07","modified_gmt":"2022-10-18T14:27:07","slug":"%e3%80%90python%e3%80%91pandas%e3%81%a7%e6%97%a5%e6%99%82%e3%82%92%e3%82%b0%e3%83%ab%e3%83%bc%e3%83%97%e9%9b%86%e8%a8%88%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/obenkyolab.com\/?p=5019","title":{"rendered":"\u3010Python\u3011pandas\u3067\u65e5\u6642\u3092\u30b0\u30eb\u30fc\u30d7\u96c6\u8a08\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/obenkyolab.com\/?p=5019\/#%E6%A6%82%E8%A6%81\" >\u6982\u8981<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/obenkyolab.com\/?p=5019\/#%E3%83%86%E3%82%B9%E3%83%88%E3%83%87%E3%83%BC%E3%82%BF\" >\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/obenkyolab.com\/?p=5019\/#%E6%96%B9%E6%B3%95%EF%BC%91_resample%E3%82%92%E4%BD%BF%E3%81%86\" >\u65b9\u6cd5\uff11 : resample\u3092\u4f7f\u3046<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/obenkyolab.com\/?p=5019\/#%E6%96%B9%E6%B3%952_Grouper%E3%82%92%E4%BD%BF%E3%81%86\" >\u65b9\u6cd52 : Grouper\u3092\u4f7f\u3046<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/obenkyolab.com\/?p=5019\/#%E3%81%BE%E3%81%A8%E3%82%81\" >\u307e\u3068\u3081<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A6%82%E8%A6%81\"><\/span>\u6982\u8981<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>python\u3067\u30c7\u30fc\u30bf\u3092\u6271\u3046\u306e\u306b\u4fbf\u5229\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u3057\u3066\u306fpandas\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306epandas\u3092\u7528\u3044\u3066\u30b0\u30eb\u30fc\u30d7\u3067\u96c6\u8a08\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u30e1\u30e2\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%83%86%E3%82%B9%E3%83%88%E3%83%87%E3%83%BC%E3%82%BF\"><\/span>\u30c6\u30b9\u30c8\u30c7\u30fc\u30bf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30c6\u30b9\u30c8\u7528\u306e\u6642\u7cfb\u5217\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u3092\u7528\u610f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>import pandas as pd\nfrom pandas import Series\ndatetime = pd.date_range(start=&#39;2021-12-31&#39;,end=&#39;2022-01-02&#39;, freq=&#39;30s&#39;)\ndf = pd.DataFrame(range(len(datetime)), index=date, columns = [&#39;val&#39;])<\/code><\/pre><\/div>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>df.head()<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"167\" height=\"164\" src=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-7.png\" alt=\"\" class=\"wp-image-5021\"\/><\/figure>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>df.tail()<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"167\" height=\"167\" src=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-8.png\" alt=\"\" class=\"wp-image-5022\" srcset=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-8.png 167w, https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-8-150x150.png 150w, https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-8-100x100.png 100w\" sizes=\"auto, (max-width: 167px) 100vw, 167px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%96%B9%E6%B3%95%EF%BC%91_resample%E3%82%92%E4%BD%BF%E3%81%86\"><\/span>\u65b9\u6cd5\uff11 : resample\u3092\u4f7f\u3046<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u65e5\u6642\u306e\u30b0\u30eb\u30fc\u30d4\u30f3\u30b0\u306b\u3064\u3044\u3066\u306fpandas\u306eresample\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u96c6\u8a08\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002resample\u306f\u30c0\u30a6\u30f3\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3059\u308b\u305f\u3081\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u3059\u304c\u3001\u96c6\u8a08\u7528\u9014\u306b\u3082\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>resample\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306b\u306f\u4ee5\u4e0b\u306e\u4e8c\u3064\u306e\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u30b0\u30eb\u30fc\u30d4\u30f3\u30b0\u5bfe\u8c61\u9805\u76ee\u306fdatetime\u578b\u306b\u3057\u3066index\u3068\u3057\u3066\u304a\u304f<\/li><\/ul>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>df[&#39;datetime&#39;] = pd.to_datetime(df[&#39;datetime&#39;])\ndf.set_index(&#39;datetime&#39;, inplace=True)<\/code><\/pre><\/div>\n\n\n\n<p>\u3042\u3068\u306fresample\u306e\u5f15\u6570\u306b\u30b0\u30eb\u30fc\u30d4\u30f3\u30b0\u3057\u305f\u3044\u5358\u4f4d\u3092\u5165\u529b\u3059\u308c\u3070\u7c21\u5358\u306b\u96c6\u8a08\u3055\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-plain\"><code>df.resample(&#39;Y&#39;).sum()<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"130\" height=\"86\" src=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-6.png\" alt=\"\" class=\"wp-image-5025\"\/><\/figure>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>df.resample(&#39;M&#39;).sum()<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"126\" height=\"96\" src=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-9.png\" alt=\"\" class=\"wp-image-5026\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%96%B9%E6%B3%952_Grouper%E3%82%92%E4%BD%BF%E3%81%86\"><\/span>\u65b9\u6cd52 : Grouper\u3092\u4f7f\u3046<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>pandas\u306eGrouper\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002\u3053\u3061\u3089\u306e\u5834\u5408\u306f\u30c0\u30a6\u30f3\u30b5\u30f3\u30d7\u30ea\u30f3\u30b0\u3067\u306f\u306a\u304f\u3001\u5358\u306b\u3042\u308b\u9805\u76ee\u3067\u30b0\u30eb\u30fc\u30d7\u5316\u3067\u304d\u308b\u6a5f\u80fd\u3067\u3042\u308b\u305f\u3081\u3001\u96c6\u8a08\u7528\u9014\u3067\u3042\u308c\u3070\u3053\u3061\u3089\u306e\u65b9\u304c\u6c4e\u7528\u6027\u304c\u9ad8\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3068\u3057\u3066\u306f\u3053\u306e\u3088\u3046\u306a\u5f62\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>df.groupby(pd.Grouper(freq=&quot;Y&quot;)).count()<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"117\" height=\"85\" src=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-11.png\" alt=\"\" class=\"wp-image-5028\"\/><\/figure>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>df.groupby(pd.Grouper(freq=&quot;M&quot;)).count()<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"121\" height=\"82\" src=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-12.png\" alt=\"\" class=\"wp-image-5029\"\/><\/figure>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306bresample\u3068\u540c\u3058\u3088\u3046\u306a\u5f62\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001Grouper\u306e\u5834\u5408\u306findex\u4ee5\u5916\u306e\u5217\u3092\u76f4\u63a5\u6307\u5b9a\u3057\u3066\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e00\u65e6\u30b0\u30eb\u30fc\u30d7\u5316\u3057\u305f\u3044datetime\u5217\u3092index\u304b\u3089\u5916\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>df_notindex = df.reset_index().rename(columns={&#39;index&#39;:&#39;datetime&#39;})\ndf_notindex.head()<\/code><\/pre><\/div>\n\n\n\n<p>Grouper\u306e\u5f15\u6570key\u3068\u3057\u3066datetime\u5217\u3092\u6e21\u3059\u3053\u3068\u3067\u96c6\u8a08\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>df_notindex.groupby(pd.Grouper(key=&quot;datetime&quot;,freq=&quot;Y&quot;)).count()<\/code><\/pre><\/div>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"124\" height=\"112\" src=\"https:\/\/obenkyolab.com\/wp-content\/uploads\/2022\/10\/image-10.png\" alt=\"\" class=\"wp-image-5031\"\/><\/figure>\n\n\n\n<p>\u307e\u305f\u3001\u8907\u6570\u306e\u30ab\u30e9\u30e0\u3067\u30b0\u30eb\u30fc\u30d7\u3057\u305f\u3044\u5834\u5408\u306fgroupby\u81ea\u4f53\u306e\u5f15\u6570\u306e\u4e2d\u306b\u30ea\u30b9\u30c8\u3067\u6e21\u3059\u3053\u3068\u3067\u5b9f\u73fe\u3067\u304d\u307e\u3059\u306e\u3067\u3001\u6c4e\u7528\u6027\u304c\u9ad8\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism line-numbers lang-python\" data-lang=\"Python\"><code>pandas.groupby([pd.Grouper(key=&quot;datetime&quot;,freq=&quot;Y&quot;),&#39;column1&#39;,&#39;column2&#39;]).count()<\/code><\/pre><\/div>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%81%BE%E3%81%A8%E3%82%81\"><\/span>\u307e\u3068\u3081<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>pandas\u3067\u65e5\u6642\u3067\u30b0\u30eb\u30fc\u30d7\u96c6\u8a08\u3057\u305f\u3044\u5834\u5408\u306b\u306fresample\u3084groupby,Grouper\u304c\u4f7f\u7528\u3067\u304d\u308b\u3002<\/li><li>groupby\u3092\u4f7f\u7528\u3057\u305f\u65b9\u304c\u6c4e\u7528\u6027\u306f\u3042\u308a\u305d\u3046<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981 python\u3067\u30c7\u30fc\u30bf\u3092\u6271\u3046\u306e\u306b\u4fbf\u5229\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u3057\u3066\u306fpand&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":1218,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_locale":"ja","_original_post":"https:\/\/obenkyolab.com\/?p=5019","footnotes":""},"categories":[7],"tags":[],"class_list":["post-5019","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","ja"],"_links":{"self":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/5019","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5019"}],"version-history":[{"count":4,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/5019\/revisions"}],"predecessor-version":[{"id":5032,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/posts\/5019\/revisions\/5032"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=\/wp\/v2\/media\/1218"}],"wp:attachment":[{"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5019"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5019"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/obenkyolab.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5019"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}