{"id":204466,"date":"2025-05-29T14:58:45","date_gmt":"2025-05-29T06:58:45","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204466\/"},"modified":"2025-05-29T14:58:45","modified_gmt":"2025-05-29T06:58:45","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-numpy-%e5%92%8c-pandas-%e7%bb%99%e9%87%8d%e5%a4%8d%e6%95%b0%e6%8d%ae%e5%8a%a0%e7%9b%b8%e5%90%8c%e5%ba%8f%e5%8f%b7%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204466\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 NumPy \u548c Pandas \u7ed9\u91cd\u590d\u6570\u636e\u52a0\u76f8\u540c\u5e8f\u53f7\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u5982\u4f55\u4f7f\u7528 NumPy \u548c Pandas \u7ed9\u91cd\u590d\u6570\u636e\u52a0\u76f8\u540c\u5e8f\u53f7\uff1f<\/h1>\n<p>\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\u4f7f\u7528 NumPy \u548c Pandas \u7ed9\u91cd\u590d\u6570\u636e\u52a0\u76f8\u540c\u5e8f\u53f7\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><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241108\/1731051769672dc0f99fb11.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u6839\u636e\u4e00\u5217\u6570\u636e\u52a0\u5e8f\u53f7\uff0c\u76f8\u540c\u6570\u636e\u52a0\u76f8\u540c\u5e8f\u53f7<\/strong><\/p>\n<p>\u4f60\u60f3\u8981\u6839\u636e\u4e00\u5217\u6570\u636e\u6dfb\u52a0\u5e8f\u53f7\uff0c\u4f7f\u5176\u4e0a\u4e0b\u76f8\u540c\u6570\u636e\u5177\u6709\u76f8\u540c\u7684\u5e8f\u53f7\uff0c\u800c\u4e0d\u540c\u7684\u6570\u636e\u5219\u987a\u5e8f\u9012\u589e\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u5982\u4f55\u4f7f\u7528 numpy \u548c pandas \u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\uff1a<\/p>\n<pre>import numpy as np\nimport pandas as pd\n\n# \u521b\u5efa\u4e00\u4e2a dataframe\uff0c\u5176\u4e2d\u6709\u4e00\u5217\u6570\u636e\u8981\u52a0\u5e8f\u53f7\ndf = pd.dataframe({\n    'data': [11, 21, 24, 24, 24, 24, 25, 25, 26, 26, 26, 26, 23, 26, 26, 26, 26, 20, 26, 26, 26, 26],\n    'nums': 0,\n})\n\n# \u4f7f\u7528 np.cumsum() \u7d2f\u52a0\u6570\u636e\u53d8\u5316\u65f6\u7684\u503c\uff0c\u5373\u4e0d\u540c\u7684\u6570\u636e\ndf['nums'] = np.cumsum(df['data'].diff() != 0)\n\n# \u8f93\u51fa\u7ed3\u679c\nprint(df)<\/pre>\n<p><strong>\u8f93\u51fa\uff1a<\/strong><\/p>\n<pre>    data  nums\n0     11     1\n1     21     2\n2     24     3\n3     24     3\n4     24     3\n5     24     3\n6     25     4\n7     25     4\n8     26     5\n9     26     5\n10    26     5\n11    26     5\n12    23     6\n13    26     7\n14    26     7\n15    26     7\n16    26     7\n17    20     8\n18    26     9\n19    26     9\n20    26     9\n21    26     9<\/pre>\n<p>\u672c\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528 NumPy \u548c Pandas \u7ed9\u91cd\u590d\u6570\u636e\u52a0\u76f8\u540c\u5e8f\u53f7\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":"<p>\u5982\u4f55\u4f7f\u7528 NumPy \u548c Pan&#46;&#46;&#46;<\/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-204466","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204466","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=204466"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204466\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204466"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204466"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204466"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}