{"id":204729,"date":"2025-05-29T12:24:20","date_gmt":"2025-05-29T04:24:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204729\/"},"modified":"2025-05-29T12:24:20","modified_gmt":"2025-05-29T04:24:20","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8pandas%e5%9c%a8%e6%95%b0%e6%8d%ae%e9%9b%86%e4%b8%ad%e7%bb%9f%e8%ae%a1%e6%af%8f%e8%a1%8c%e5%a4%a7%e4%ba%8e%e6%8c%87%e6%a0%87%e5%80%bc%e7%9a%84","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204729\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528pandas\u5728\u6570\u636e\u96c6\u4e2d\u7edf\u8ba1\u6bcf\u884c\u5927\u4e8e\u201c\u6307\u6807\u201d\u503c\u7684\u5217\u7684\u4e2a\u6570\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528pandas\u5728\u6570\u636e\u96c6\u4e2d\u7edf\u8ba1\u6bcf\u884c\u5927\u4e8e\u201c\u6307\u6807\u201d\u503c\u7684\u5217\u7684\u4e2a\u6570\uff1f<\/h1>\n

\u201c\u7eb5\u6709\u75be\u98ce\u6765\uff0c\u4eba\u751f\u4e0d\u8a00\u5f03\u201d\uff0c\u8fd9\u53e5\u8bdd\u9001\u7ed9\u6b63\u5728\u5b66\u4e60\u7684\u670b\u53cb\u4eec\uff0c\u4e5f\u5e0c\u671b\u5728\u9605\u8bfb\u672c\u6587\u300a\u5982\u4f55\u4f7f\u7528pandas\u5728\u6570\u636e\u96c6\u4e2d\u7edf\u8ba1\u6bcf\u884c\u5927\u4e8e\u201c\u6307\u6807\u201d\u503c\u7684\u5217\u7684\u4e2a\u6570\uff1f\u300b<\/span>\u540e\uff0c\u80fd\u591f\u771f\u7684\u5e2e\u52a9\u5230\u5927\u5bb6\u3002\u6211\u4e5f\u4f1a\u5728\u540e\u7eed\u7684\u6587\u7ae0\u4e2d\uff0c\u9646\u7eed\u66f4\u65b0\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u6280\u672f\u6587\u7ae0\uff0c\u6709\u597d\u7684\u5efa\u8bae\u6b22\u8fce\u5927\u5bb6\u5728\u8bc4\u8bba\u7559\u8a00\uff0c\u975e\u5e38\u611f\u8c22\uff01<\/p>\n

<\/p>\n

\u4f7f\u7528pandas\u5b9e\u73b0excel\u4e2dcountif\u51fd\u6570<\/strong><\/p>\n

\u5728pandas\u4e2d\u5b9e\u73b0\u7c7b\u4f3c\u4e8eexcel countif\u51fd\u6570\u7684\u529f\u80fd\u975e\u5e38\u7b80\u5355\u3002\u5047\u5982\u6709\u5982\u4e0b\u6240\u793a\u7684\u6570\u636e\u96c6\uff0c\u5176\u4e2d\u9700\u8981\u7edf\u8ba1\u6bcf\u884c\u4e2d\u5927\u4e8e\u201c\u6307\u6807\u201d\u503c\u7684\u5217\u7684\u4e2a\u6570\uff1a<\/p>\n

import pandas as pd\n\ndata = pd.dataframe({\n    'x1': [10, 20, 30, 40],\n    'x2': [15, 25, 35, 45],\n    'x3': [20, 30, 40, 50],\n    'x4': [25, 35, 45, 55],\n    '\u6307\u6807': [18, 28, 38, 48]\n})<\/pre>\n
\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4ee3\u7801\u5b9e\u73b0\u6b64\u529f\u80fd\uff1a<\/p>\n
data['countif'] = data.apply(lambda x : sum(data.loc[x.name, 'X1':'X4'] > data.loc[x.name, '\u6307\u6807']), axis =1)<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • apply(lambda x : …)\uff1a\u5c06\u81ea\u5b9a\u4e49\u51fd\u6570\u5e94\u7528\u4e8e\u6bcf\u4e00\u884c\u6570\u636e\u3002<\/li>\n
  • x.name\uff1a\u83b7\u53d6\u5f53\u524d\u884c\u7684\u7d22\u5f15\u503c\u3002<\/li>\n
  • data.loc[x.name, ‘x1′:’x4’]\uff1a\u83b7\u53d6\u5f53\u524d\u884c\u7684’x1’\u5230’x4’\u5217\u6570\u636e\u3002<\/li>\n
  • > data.loc[x.name, ‘\u6307\u6807’]\uff1a\u5c06\u5f53\u524d\u884c\u7684’x1′:’x4’\u5217\u4e0e’\u6307\u6807’\u5217\u6bd4\u8f83\uff0c\u7ed3\u679c\u4e3a\u5e03\u5c14\u503c\u3002<\/li>\n
  • sum(…)\uff1a\u7edf\u8ba1\u6bd4\u8f83\u7ed3\u679c\u4e2dtrue\u7684\u4e2a\u6570\u3002<\/li>\n<\/ul>\n
    \u672c\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528pandas\u5728\u6570\u636e\u96c6\u4e2d\u7edf\u8ba1\u6bcf\u884c\u5927\u4e8e\u201c\u6307\u6807\u201d\u503c\u7684\u5217\u7684\u4e2a\u6570\uff1f\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u4f7f\u7528pandas\u5728\u6570\u636e\u96c6\u4e2d\u7edf...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204729","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204729","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204729"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204729\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}