{"id":205443,"date":"2025-05-29T16:40:06","date_gmt":"2025-05-29T08:40:06","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205443\/"},"modified":"2025-05-29T16:40:06","modified_gmt":"2025-05-29T08:40:06","slug":"%e5%a6%82%e4%bd%95%e5%b0%86%e4%b8%a4%e4%b8%aa-dataframe-%e5%90%88%e5%b9%b6%e5%b9%b6%e5%a4%84%e7%90%86%e4%b8%8d%e5%ad%98%e5%9c%a8%e7%9a%84%e5%88%97%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205443\/","title":{"rendered":"\u5982\u4f55\u5c06\u4e24\u4e2a DataFrame \u5408\u5e76\u5e76\u5904\u7406\u4e0d\u5b58\u5728\u7684\u5217\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u5c06\u4e24\u4e2a DataFrame \u5408\u5e76\u5e76\u5904\u7406\u4e0d\u5b58\u5728\u7684\u5217\uff1f<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u5411\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u5c06\u4e24\u4e2a DataFrame \u5408\u5e76\u5e76\u5904\u7406\u4e0d\u5b58\u5728\u7684\u5217\uff1f\u300b\uff0c\u4e3b\u8981\u5305\u62ec\uff0c\u5177\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n

<\/p>\n

\u5408\u5e76\u4e24\u4e2a dataframe<\/strong><\/p>\n

\u5728 python \u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u5c06\u591a\u4e2a dataframe \u5408\u5e76\u4e3a\u4e00\u4e2a\u3002\u5982\u4f55\u5904\u7406\u4e0d\u5b58\u5728\u4e8e\u5176\u4ed6 dataframe \u4e2d\u7684\u5217\u662f\u5408\u5e76\u8fc7\u7a0b\u4e2d\u7684\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\u3002<\/p>\n

\u95ee\u9898<\/strong><\/p>\n

\u73b0\u6709\u7684 dataframe1 \u548c dataframe2 \u5982\u4e0b\uff1a<\/p>\n

dataframe1:\nname    a   b   c   label\ntest1   1   2   2   1\ntest2   11  10  9   2\n\ndataframe2:\nname    b   a   d   label\ntest3   3   2   1   unkonwn<\/pre>\n
\u76ee\u6807\u662f\u5408\u5e76\u8fd9\u4e24\u4e2a dataframe\uff0c\u5f62\u6210 dataframe3\uff0c\u8981\u6c42\uff1a<\/p>\n
    \n
  • dataframe2 \u7684\u6570\u636e\u6dfb\u52a0\u5230 dataframe1 \u7684\u6700\u540e\u4e00\u884c\u3002<\/li>\n
  • dataframe1 \u4e2d\u5b58\u5728\u7684\u4f46 dataframe2 \u4e2d\u4e0d\u5b58\u5728\u7684\u5217 (\u5982 c) \u5728 test3 \u7684\u503c\u5e94\u4e3a 0\u3002<\/li>\n
  • dataframe2 \u4e2d\u5b58\u5728\u4f46 dataframe1 \u4e2d\u4e0d\u5b58\u5728\u7684\u5217 (\u5982 d) \u5728 test1 \u548c test2 \u7684\u503c\u5e94\u4e3a 0\u3002<\/li>\n<\/ul>\n
    \u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n
    \u4f7f\u7528 python \u4e2d\u7684 pandas \u5e93\uff0c\u8be5\u5e93\u63d0\u4f9b\u4e86\u51e0\u79cd\u5408\u5e76 dataframe \u7684\u65b9\u6cd5\u3002<\/p>\n
    import pandas as pd\n\n# \u7528\u8fde\u63a5\u5408\u5e76 dataframe\ndataframe3 = pd.concat([dataframe1, dataframe2], ignore_index=true)\n\n# \u586b\u5145 dataframe3 \u4e2d\u4e0d\u5b58\u5728\u7684\u5217\ndataframe3.fillna(0, inplace=true)<\/pre>\n
    \u5408\u5e76\u540e\u7684 dataframe3 \u5982\u4e0b\uff1a<\/p>\n
    DataFrame3:\nname    A   B   C   D   label\ntest1   1   2   2   0   1\ntest2   11  10  9   0   2\ntest3   2   3   0   1   UNKONWN<\/pre>\n
    \u8fd9\u79cd\u65b9\u6cd5\u6709\u6548\u5730\u5408\u5e76\u4e86\u4e24\u4e2a dataframe\uff0c\u5e76\u5904\u7406\u4e86\u4e0d\u5b58\u5728\u5217\u7684\u60c5\u51b5\uff0c\u786e\u4fdd\u6700\u7ec8\u7ed3\u679c\u6ee1\u8db3\u8981\u6c42\u3002<\/p>\n
    \u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u5c06\u4e24\u4e2a DataFrame \u5408\u5e76\u5e76\u5904\u7406\u4e0d\u5b58\u5728\u7684\u5217\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u5c06\u4e24\u4e2a DataFrame ...<\/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-205443","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205443","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=205443"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205443\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}