{"id":2380,"date":"2023-07-22T12:59:53","date_gmt":"2023-07-22T12:59:53","guid":{"rendered":"https:\/\/statorials.org\/cn\/pandas-%e7%94%a8%e4%b8%81%e5%ad%97%e8%a3%a4%e4%bb%a3%e6%9b%bf-nan\/"},"modified":"2023-07-22T12:59:53","modified_gmt":"2023-07-22T12:59:53","slug":"pandas-%e7%94%a8%e4%b8%81%e5%ad%97%e8%a3%a4%e4%bb%a3%e6%9b%bf-nan","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/pandas-%e7%94%a8%e4%b8%81%e5%ad%97%e8%a3%a4%e4%bb%a3%e6%9b%bf-nan\/","title":{"rendered":"Pandas\uff1a\u5982\u4f55\u7528\u5b57\u7b26\u4e32\u66ff\u6362 nan \u503c"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5c06 pandas DataFrame \u4e2d\u7684 NaN \u503c\u66ff\u6362\u4e3a\u5b57\u7b26\u4e32\uff1a<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>\u65b9\u6cd51\uff1a\u5728\u6574\u4e2aDataFrame\u4e2d\u7528\u5b57\u7b26\u4e32\u66ff\u6362NaN\u503c<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">fillna<\/span> ('', inplace= <span style=\"color: #008000;\">True<\/span> )\n<\/strong><\/pre>\n<p><span style=\"color: #000000;\"><strong>\u65b9\u6cd52\uff1a\u5c06\u7279\u5b9a\u5217\u4e2d\u7684NaN\u503c\u66ff\u6362\u4e3a\u5b57\u7b26\u4e32<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df[[' <span style=\"color: #ff0000;\">col1<\/span> ', ' <span style=\"color: #ff0000;\">col2<\/span> ']] = df[[' <span style=\"color: #ff0000;\">col1<\/span> ', ' <span style=\"color: #ff0000;\">col2<\/span> ']]. <span style=\"color: #3366ff;\">fillna<\/span> ('')<\/strong><\/pre>\n<p><span style=\"color: #000000;\"><strong>\u65b9\u6cd53\uff1a\u7528\u5217\u4e2d\u7684\u5b57\u7b26\u4e32\u66ff\u6362NaN\u503c<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df. <span style=\"color: #3366ff;\">col1<\/span> = df. <span style=\"color: #3366ff;\">col1<\/span> . <span style=\"color: #3366ff;\">fillna<\/span> ('')<\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5c06\u6bcf\u79cd\u65b9\u6cd5\u4e0e\u4ee5\u4e0b pandas DataFrame \u4e00\u8d77\u4f7f\u7528\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n\n<span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#create DataFrame with some NaN values\n<\/span>df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">team<\/span> ': ['A', 'A', 'A', 'A', 'B', 'B', 'B', 'B'],\n                   ' <span style=\"color: #ff0000;\">points<\/span> ': [np.nan, 11, 7, 7, 8, 6, 14, 15],\n                   ' <span style=\"color: #ff0000;\">assists<\/span> ': [5, np.nan, 7, 9, 12, 9, 9, 4],\n                   ' <span style=\"color: #ff0000;\">rebounds<\/span> ': [11, 8, 10, np.nan, 6, 5, 9, np.nan]})<\/span>\n\n<span style=\"color: #008080;\">#view DataFrame<\/span>\n<span style=\"color: #000000;\">df\n\nteam points assists rebounds\n0 A NaN 5.0 11.0\n1 A 11.0 NaN 8.0\n2 A 7.0 7.0 10.0\n3 A 7.0 9.0 NaN\n4 B 8.0 12.0 6.0\n5 B 6.0 9.0 5.0\n6 B 14.0 9.0 9.0\n7 B 15.0 4.0 NaN\n<\/span><\/span><\/strong><\/pre>\n<h3><span style=\"color: #000000;\"><strong>\u65b9\u6cd51\uff1a\u5728\u6574\u4e2aDataFrame\u4e2d\u7528\u5b57\u7b26\u4e32\u66ff\u6362NaN\u503c<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u7528\u7a7a\u5b57\u7b26\u4e32\u66ff\u6362\u6574\u4e2a DataFrame \u4e2d\u7684\u6bcf\u4e2a NaN \u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#replace NaN values in all columns with empty string\n<\/span>df. <span style=\"color: #3366ff;\">fillna<\/span> ('', inplace= <span style=\"color: #008000;\">True<\/span> )\n\n<span style=\"color: #008080;\">#view updated DataFrame\n<\/span>df\n\n\tteam points assists rebounds\n0 A 5.0 11.0\n1 A 11.0 8.0\n2 A 7.0 7.0 10.0\n3 A 7.0 9.0\t\n4 B 8.0 12.0 6.0\n5 B 6.0 9.0 5.0\n6 B 14.0 9.0 9.0\n7B 15.0 4.0\t\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\uff0c\u6bcf\u5217\u4e2d\u7684\u6bcf\u4e2a NaN \u503c\u5747\u5df2\u66ff\u6362\u4e3a\u7a7a\u5b57\u7b26\u4e32\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u65b9\u6cd52\uff1a\u5c06\u7279\u5b9a\u5217\u4e2d\u7684NaN\u503c\u66ff\u6362\u4e3a\u5b57\u7b26\u4e32<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u7528\u7279\u5b9a\u5b57\u7b26\u4e32\u66ff\u6362\u7279\u5b9a\u5217\u4e2d\u7684 NaN \u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#replace NaN values in 'points' and 'rebounds' columns with 'none'\n<\/span>df[[' <span style=\"color: #ff0000;\">points<\/span> ', ' <span style=\"color: #ff0000;\">rebounds<\/span> ']] = df[[' <span style=\"color: #ff0000;\">points<\/span> ', ' <span style=\"color: #ff0000;\">rebounds<\/span> ']]. <span style=\"color: #3366ff;\">fillna<\/span> (' <span style=\"color: #ff0000;\">none<\/span> ')\n\n<span style=\"color: #008080;\">#view updated DataFrame\n<\/span>df\n\n        team points assists rebounds\n0 A none 5.0 11.0\n1 A 11.0 NaN 8.0\n2 A 7.0 7.0 10.0\n3 A 7.0 9.0 none\n4 B 8.0 12.0 6.0\n5 B 6.0 9.0 5.0\n6 B 14.0 9.0 9.0\n7 B 15.0 4.0 none\t\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\uff0c\u201c\u5f97\u5206\u201d\u548c\u201c\u7bee\u677f\u201d\u5217\u4e2d\u7684 NaN \u503c\u5df2\u66ff\u6362\u4e3a\u5b57\u7b26\u4e32\u201cnone\u201d\uff0c\u4f46\u201c\u52a9\u653b\u201d\u5217\u4e2d\u7684 NaN \u503c\u4fdd\u6301\u4e0d\u53d8\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u65b9\u6cd53\uff1a\u7528\u5217\u4e2d\u7684\u5b57\u7b26\u4e32\u66ff\u6362NaN\u503c<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u5982\u4f55\u7528\u7279\u5b9a\u5b57\u7b26\u4e32\u66ff\u6362\u5217\u4e2d\u7684 NaN \u503c\uff1a<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">#replace NaN values in 'points' column with 'zero'\n<\/span>df. <span style=\"color: #3366ff;\">points<\/span> = df. <span style=\"color: #3366ff;\">points<\/span> . <span style=\"color: #3366ff;\">fillna<\/span> (' <span style=\"color: #ff0000;\">zero<\/span> ')\n\n<span style=\"color: #008080;\">#view updated DataFrame\n<\/span>df\n\n\tteam points assists rebounds\n0 To zero 5.0 11.0\n1 A 11.0 NaN 8.0\n2 A 7.0 7.0 10.0\n3 A 7.0 9.0 NaN\n4 B 8.0 12.0 6.0\n5 B 6.0 9.0 5.0\n6 B 14.0 9.0 9.0\n7 B 15.0 4.0 NaN\t\n<\/span><\/span><\/strong><\/pre>\n<p><span style=\"color: #000000;\">\u8bf7\u6ce8\u610f\uff0c\u201c\u70b9\u6570\u201d\u5217\u4e2d\u7684 NaN \u503c\u88ab\u66ff\u6362\u4e3a\u5b57\u7b26\u4e32\u201c\u96f6\u201d\uff0c\u4f46\u201c\u52a9\u653b\u201d\u548c\u201c\u7bee\u677f\u201d\u5217\u4e2d\u7684 NaN \u503c\u4fdd\u6301\u4e0d\u53d8\u3002<\/span><\/p>\n<h3><span style=\"color: #000000;\"><strong>\u5176\u4ed6\u8d44\u6e90<\/strong><\/span><\/h3>\n<p><span style=\"color: #000000;\">\u4ee5\u4e0b\u6559\u7a0b\u89e3\u91ca\u4e86\u5982\u4f55\u5728 pandas \u4e2d\u6267\u884c\u5176\u4ed6\u5e38\u89c1\u64cd\u4f5c\uff1a<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/cn\/pandas-\u6839\u636e\u72b6\u6001\u66ff\u6362\u5217\u4e2d\u7684\u503c\/\" target=\"_blank\" rel=\"noopener\">Pandas\uff1a\u5982\u4f55\u6839\u636e\u6761\u4ef6\u66ff\u6362\u5217\u4e2d\u7684\u503c<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/pandas-\u5c06-nan-\u66ff\u6362\u4e3a-0\/\" target=\"_blank\" rel=\"noopener\">Pandas\uff1a\u5982\u4f55\u7528\u96f6\u66ff\u6362 NaN \u503c<\/a><br \/><a href=\"https:\/\/statorials.org\/cn\/pandas-\u8ba1\u7b97\u7f3a\u5931\u503c\/\" target=\"_blank\" rel=\"noopener\">Pandas\uff1a\u5982\u4f55\u8ba1\u7b97DataFrame\u4e2d\u7684\u7f3a\u5931\u503c<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\u5c06 pandas DataFrame \u4e2d\u7684 NaN \u503c\u66ff\u6362\u4e3a\u5b57\u7b26\u4e32\uff1a \u65b9\u6cd51\uff1a\u5728\u6574\u4e2aData [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2380","post","type-post","status-publish","format-standard","hentry","category-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Pandas\uff1a\u5982\u4f55\u7528\u5b57\u7b26\u4e32\u66ff\u6362 NaN \u503c - Statorials<\/title>\n<meta name=\"description\" content=\"\u672c\u6559\u7a0b\u901a\u8fc7\u51e0\u4e2a\u793a\u4f8b\u89e3\u91ca\u4e86\u5982\u4f55\u7528\u7279\u5b9a\u5b57\u7b26\u4e32\u66ff\u6362 pandas DataFrame \u4e2d\u7684 NaN \u503c\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/cn\/pandas-\u7528\u4e01\u5b57\u88e4\u4ee3\u66ff-nan\/\" 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