{"id":205257,"date":"2025-05-29T08:37:40","date_gmt":"2025-05-29T00:37:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205257\/"},"modified":"2025-05-29T08:37:40","modified_gmt":"2025-05-29T00:37:40","slug":"%e5%a6%82%e4%bd%95%e7%94%a8python%e7%bb%9f%e8%ae%a1%e5%88%86%e7%b1%bb%e5%88%97%e6%95%b0%e6%8d%ae%e5%9c%a8%e4%b8%8d%e5%90%8c%e6%97%a5%e6%9c%9f%e7%9a%84%e5%87%ba%e7%8e%b0%e6%ac%a1%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205257\/","title":{"rendered":"\u5982\u4f55\u7528Python\u7edf\u8ba1\u5206\u7c7b\u5217\u6570\u636e\u5728\u4e0d\u540c\u65e5\u671f\u7684\u51fa\u73b0\u6b21\u6570\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u7528Python\u7edf\u8ba1\u5206\u7c7b\u5217\u6570\u636e\u5728\u4e0d\u540c\u65e5\u671f\u7684\u51fa\u73b0\u6b21\u6570\uff1f<\/h1>\n

\u5bf9\u4e8e\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0c\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300a\u5982\u4f55\u7528Python\u7edf\u8ba1\u5206\u7c7b\u5217\u6570\u636e\u5728\u4e0d\u540c\u65e5\u671f\u7684\u51fa\u73b0\u6b21\u6570\uff1f\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

<\/p>\n

\u5982\u4f55\u7edf\u8ba1\u8f6c\u6362\u5217\u8f6c\u6570\u636e<\/strong><\/p>\n

\u60f3\u8981\u5c06\u8f6c\u6362\u540e\u7684\u5217\u8f6c\u6362\u4e3a\u7edf\u8ba1\u6570\u5b57\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

1. \u865a\u62df\u5316\u8f6c\u6362\u5217<\/strong><\/p>\n

\u4f7f\u7528 pd.get_dummies() \u51fd\u6570\u5c06\u8f6c\u6362\u5217\u8f6c\u6362\u4e3a\u865a\u62df\u5217\uff0c\u6bcf\u4e2a\u7c7b\u522b\u521b\u5efa\u4e00\u4e2a\u5e03\u5c14\u5217\uff0c\u5176\u4e2d 1 \u8868\u793a\u5b58\u5728\uff0c0 \u8868\u793a\u4e0d\u5b58\u5728\uff1a<\/p>\n

df_dummies = pd.get_dummies(df, columns=['type'])<\/pre>\n
2. \u5206\u7ec4\u548c\u6c42\u548c<\/strong><\/p>\n
\u4f7f\u7528 df.groupby() \u6839\u636e\u65e5\u671f\u5bf9\u865a\u62df\u5217\u8fdb\u884c\u5206\u7ec4\uff0c\u7136\u540e\u4f7f\u7528 sum() \u6c42\u51fa\u6bcf\u4e2a\u65e5\u671f\u6bcf\u4e2a\u7c7b\u522b\u51fa\u73b0\u7684\u6b21\u6570\uff1a<\/p>\n
df_group = df_dummies.groupby(\"date\").sum()<\/pre>\n
3. \u8f93\u51fa\u7ed3\u679c<\/strong><\/p>\n
\u73b0\u5728\uff0cdf_group \u5c06\u5305\u542b\u6309\u65e5\u671f\u7edf\u8ba1\u7684\u6bcf\u4e2a\u7c7b\u522b\u7684\u6570\u91cf\uff1a<\/p>\n
print(df_dummies)\nprint(\"-\". * 60)\nprint(df_group)<\/pre>\n
\u8f93\u51fa\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
          date  type_1  type_2  type_3  type_4  type_5\n0   2024-01-01       1       0       0       0       0\n1   2024-01-01       0       1       0       0       0\n2   2024-01-01       1       0       0       0       0\n3   2024-01-02       0       0       1       0       0\n4   2024-01-02       0       1       0       0       0\n5   2024-01-02       0       0       1       0       0\n6   2024-01-02       1       0       0       0       0\n7   2024-01-02       1       0       0       0       0\n8   2024-01-03       1       0       0       1       0\n9   2024-01-03       0       0       0       1       0\n10  2024-01-03       0       1       0       0       0\n11  2024-01-03       0       0       0       0       1\n------------------------------------------------------------\ntype_1  type_2  type_3  type_4  type_5          \ndate                                                        \n2024-01-01       2       1       0       0       0          \n2024-01-02       2       1       2       0       0          \n2024-01-03       1       1       1       1       1<\/pre>\n
\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300a\u5982\u4f55\u7528Python\u7edf\u8ba1\u5206\u7c7b\u5217\u6570\u636e\u5728\u4e0d\u540c\u65e5\u671f\u7684\u51fa\u73b0\u6b21\u6570\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u7528Python\u7edf\u8ba1\u5206\u7c7b\u5217\u6570\u636e...<\/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-205257","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205257","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=205257"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205257\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}