{"id":279,"date":"2023-06-02T11:12:17","date_gmt":"2023-07-01T08:58:47","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e8%8e%b7%e5%8f%96r%e4%b8%ad%e7%9a%84%e8%a1%8c%e6%95%b0%e5%92%8c%e5%88%97%e6%95%b0\/"},"modified":"2025-08-01T03:15:51","modified_gmt":"2025-07-31T19:15:51","slug":"%e8%8e%b7%e5%8f%96r%e4%b8%ad%e7%9a%84%e8%a1%8c%e6%95%b0%e5%92%8c%e5%88%97%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%8e%b7%e5%8f%96r%e4%b8%ad%e7%9a%84%e8%a1%8c%e6%95%b0%e5%92%8c%e5%88%97%e6%95%b0\/","title":{"rendered":"R\u8bed\u8a00\uff1a\u9ad8\u6548\u83b7\u53d6\u6570\u636e\u6846\u884c\u6570\u4e0e\u5217\u6570\uff08\u7ef4\u5ea6\uff09"},"content":{"rendered":"

\u8fd9\u662f\u6587\u7ae0\u300a\u83b7\u53d6R\u4e2d\u7684\u884c\u6570\u548c\u5217\u6570\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n

\u5927\u5bb6\u597d\uff0c\u8bfb\u8005\u4eec\uff01\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecdR\u7f16\u7a0b\u4e2d\u7684\u884c\u548c\u5217\u6982\u5ff5\uff0c\u4ee5\u53ca\u5982\u4f55\u83b7\u53d6R\u5bf9\u8c61\uff08\u5982\u77e9\u9635\u3001\u6570\u636e\u6846\uff09\u7684\u884c\u6570\u548c\u5217\u6570\u3002<\/p>\n

\u90a3\u4e48\uff0c\u8ba9\u6211\u4eec\u5f00\u59cb\u5427\uff01 \ud83d\ude42<\/p>\n

\u65e0\u8bba\u662f\u77e9\u9635\u8fd8\u662f\u6570\u636e\u6846\uff0c\u6211\u4eec\u90fd\u6309\u884c\u548c\u5217\u6765\u5904\u7406\u6570\u636e\u3002\u5728\u6570\u636e\u5206\u6790\u9886\u57df\uff0c\u5c24\u5176\u662f\u7edf\u8ba1\u5206\u6790\u4e2d\uff0c\u4e86\u89e3\u5bf9\u8c61\u7684\u8be6\u7ec6\u4fe1\u606f\uff08\u5373\u8868\u793a\u6570\u636e\u503c\u7684\u884c\u6570\u548c\u5217\u6570\uff09\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

R\u7f16\u7a0b\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e9b\u7b80\u5355\u7684\u51fd\u6570\uff0c\u8ba9\u6211\u4eec\u8f7b\u677e\u83b7\u5f97\u76f8\u5173\u4fe1\u606f\uff01\u6240\u4ee5\uff0c\u8ba9\u6211\u4eec\u9010\u4e2a\u6765\u770b\u770b\u5427\u3002<\/p>\n

\n

\u5728R\u7f16\u7a0b\u4e2d\uff0c\u4f7f\u7528ncol()<\/code>\u51fd\u6570\u83b7\u53d6\u5bf9\u8c61\u7684\u5217\u6570<\/h2>\n

R\u7f16\u7a0b\u901a\u8fc7ncol()<\/code>\u51fd\u6570\u5e2e\u52a9\u6211\u4eec\u83b7\u53d6\u5bf9\u8c61\u7684\u5217\u6570\u4fe1\u606f\u3002<\/p>\n

\u4e5f\u5c31\u662f\u8bf4\uff0cncol()<\/code>\u51fd\u6570\u8fd4\u56de\u5bf9\u8c61\u4e2d\u5b58\u5728\u7684\u5217\u7684\u603b\u6570\u3002<\/p>\n

\u8bed\u6cd5:<\/h3>\n
ncol(object)\r\n<\/code><\/pre>\n
\u6211\u4eec\u9700\u8981\u4f20\u9012\u5305\u542b\u6570\u636e\u7684\u5bf9\u8c61\u3002\u8fd9\u91cc\u7684\u5bf9\u8c61\u53ef\u4ee5\u662f\u6570\u636e\u6846\u3001\u77e9\u9635\u751a\u81f3\u6570\u636e\u96c6\u3002<\/p>\n
\u793a\u4f8b 1: \u83b7\u53d6\u77e9\u9635\u7684\u5217\u6570<\/h3>\n
\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u77e9\u9635\u3002\u63a5\u4e0b\u6765\uff0c\u4f7f\u7528ncol()<\/code>\u51fd\u6570\uff0c\u6211\u4eec\u5c1d\u8bd5\u83b7\u53d6\u77e9\u9635\u4e2d\u5217\u7684\u6570\u91cf\u3002<\/p>\n
rm(list = ls())\r\ndata = matrix(c(10,20,30,40),2,6)\r\nprint(data)\r\nprint('\u77e9\u9635\u7684\u5217\u6570: ')\r\nprint(ncol(data))\r\n<\/code><\/pre>\n
\u8f93\u51fa:<\/h3>\n
> print(data)\r\n     [,1] [,2] [,3] [,4] [,5] [,6]\r\n[1,]   10   30   10   30   10   30\r\n[2,]   20   40   20   40   20   40\r\n> print('\u77e9\u9635\u7684\u5217\u6570: ')\r\n[1] \"\u77e9\u9635\u7684\u5217\u6570: \"\r\n> print(ncol(data))\r\n[1] 6\r\n<\/code><\/pre>\n
\u793a\u4f8b 2: \u83b7\u53d6\u6570\u636e\u96c6\u7684\u5217\u6570<\/h3>\n
\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u4f7f\u7528read.csv()<\/code>\u51fd\u6570\u5c06\u94f6\u884c\u8d37\u6b3e\u8fdd\u7ea6\u8005\u9884\u6d4b\u6570\u636e\u96c6\u5bfc\u5165R\u73af\u5883\u3002\u4f60\u53ef\u4ee5\u5728\u8fd9\u91cc<\/a>\u627e\u5230\u6570\u636e\u96c6\uff01<\/p>\n
\u901a\u8fc7\u4f7f\u7528 ncol()<\/code> \u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u68c0\u6d4b\u5e76\u63d0\u53d6\u6570\u636e\u96c6\u4e2d\u7684\u5217\u6570\u3002<\/p>\n
rm(list = ls())\r\ngetwd()\r\n#\u52a0\u8f7d\u6570\u636e\u96c6\r\ndta = read.csv(\"bank-loan.csv\",header=TRUE)\r\nprint('\u5217\u6570: ')\r\nprint(ncol(dta))\r\n<\/code><\/pre>\n
\u8f93\u51fa:<\/h3>\n
\u5217\u6570: \r\n9\r\n<\/code><\/pre>\n
\n
R\u7f16\u7a0b\u4e2d\u7684nrow()<\/code>\u51fd\u6570<\/h2>\n
\u83b7\u53d6R\u4e2d\u7684\u884c\u6570<\/h2>\n
\u5728\u4e86\u89e3\u4e86R\u4e2d\u5982\u4f55\u83b7\u53d6\u5217\u6570\u4e4b\u540e\uff0c\u73b0\u5728\u662f\u65f6\u5019\u63a2\u8ba8\u5982\u4f55\u83b7\u53d6\u5bf9\u8c61\u7684\u884c\u6570\u4e86\u3002<\/p>\n
R\u8bed\u8a00\u63d0\u4f9b\u4e86nrow()<\/code>\u51fd\u6570\u6765\u83b7\u53d6\u5bf9\u8c61\u7684\u884c\u6570\u3002\u901a\u8fc7nrow()<\/code>\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u68c0\u6d4b\u548c\u63d0\u53d6\u77e9\u9635\u3001\u6570\u636e\u6846\u751a\u81f3\u6570\u636e\u96c6\u4e2d\u7684\u884c\u6570\u3002<\/p>\n
\u8bed\u6cd5\uff1a<\/h3>\n
nrow(object<\/span>)\r\n<\/code><\/pre>\n
\u793a\u4f8b 1\uff1a\u83b7\u53d6\u77e9\u9635\u7684\u884c\u6570<\/h3>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528R\u4e2d\u7684matrix()<\/code>\u51fd\u6570\u521b\u5efa\u4e86\u4e00\u4e2a\u77e9\u9635\u3002\u7136\u540e\uff0c\u6211\u4eec\u4f7f\u7528nrow()<\/code>\u51fd\u6570\u6765\u83b7\u53d6\u77e9\u9635\u4e2d\u7684\u884c\u6570\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
rm<\/span>(<\/span>list =<\/span> ls<\/span>(<\/span>)<\/span>)<\/span>\r\ndata =<\/span> matrix<\/span>(<\/span>c<\/span>(<\/span>10<\/span>,<\/span>20<\/span>,<\/span>30<\/span>,<\/span>40<\/span>)<\/span>,<\/span>2<\/span>,<\/span>6<\/span>)<\/span>\r\nprint<\/span>(<\/span>data)<\/span>\r\nprint<\/span>(<\/span>'\u77e9\u9635\u7684\u884c\u6570\uff1a'<\/span>)<\/span>\r\nprint<\/span>(<\/span>nrow<\/span>(<\/span>data)<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u7ed3\u679c\uff1a<\/h4>\n
><\/span> print<\/span>(<\/span>data)<\/span>\r\n     [<\/span>,<\/span>1<\/span>]<\/span> [<\/span>,<\/span>2<\/span>]<\/span> [<\/span>,<\/span>3<\/span>]<\/span> [<\/span>,<\/span>4<\/span>]<\/span> [<\/span>,<\/span>5<\/span>]<\/span> [<\/span>,<\/span>6<\/span>]<\/span>\r\n[<\/span>1<\/span>,<\/span>]<\/span>   10<\/span>   30<\/span>   10<\/span>   30<\/span>   10<\/span>   30<\/span>\r\n[<\/span>2<\/span>,<\/span>]<\/span>   20<\/span>   40<\/span>   20<\/span>   40<\/span>   20<\/span>   40<\/span>\r\n\r\n\"\u77e9\u9635\u7684\u884c\u6570\uff1a\"<\/span>\r\n[<\/span>1<\/span>]<\/span> 2<\/span>\r\n<\/code><\/pre>\n
\u793a\u4f8b 2\uff1a\u83b7\u53d6\u6570\u636e\u96c6\u7684\u884c\u6570<\/h3>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e0e\u4e4b\u524dncol()<\/code>\u51fd\u6570\u90e8\u5206\u76f8\u540c\u7684\u201c\u94f6\u884c\u8d37\u6b3e\u8fdd\u7ea6\u8005\u201d\u6570\u636e\u96c6\u3002<\/p>\n
\u5728\u5c06\u6570\u636e\u96c6\u52a0\u8f7d\u5230R\u73af\u5883\u540e\uff0c\u6211\u4eec\u4f7f\u7528nrow()<\/code>\u51fd\u6570\u6765\u63d0\u53d6\u6570\u636e\u96c6\u4e2d\u7684\u884c\u6570\u3002<\/p>\n
rm<\/span>(<\/span>list =<\/span> ls<\/span>(<\/span>)<\/span>)<\/span>\r\ngetwd<\/span>(<\/span>)<\/span>\r\n# \u52a0\u8f7d\u6570\u636e\u96c6<\/span>\r\ndta =<\/span> read.csv<\/span>(<\/span>\"bank-loan.csv\"<\/span>,<\/span>header=<\/span>TRUE<\/span>)<\/span>\r\nprint<\/span>(<\/span>'\u884c\u6570\uff1a'<\/span>)<\/span>\r\nprint<\/span>(<\/span>nrow<\/span>(<\/span>dta)<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u8f93\u51fa\uff1a<\/h4>\n
\"\u884c\u6570\uff1a\"<\/span>\r\n850<\/span>\r\n<\/code><\/pre>\n
\u7ed3\u8bba<\/h2>\n
\u901a\u8fc7\u672c\u6587\uff0c\u60a8\u5e94\u8be5\u5df2\u7ecf\u638c\u63e1\u4e86\u5728R\u4e2d\u5982\u4f55\u4f7f\u7528nrow()<\/code>\u51fd\u6570\u83b7\u53d6\u77e9\u9635\u548c\u6570\u636e\u96c6\u7684\u884c\u6570\u3002\u8fd9\u5bf9\u4e8e\u6570\u636e\u5206\u6790\u548c\u5904\u7406\u6765\u8bf4\u662f\u4e00\u4e2a\u975e\u5e38\u57fa\u7840\u4e14\u91cd\u8981\u7684\u64cd\u4f5c\u3002<\/p>\n
\u81f3\u6b64\uff0c\u5173\u4e8e\u201c\u83b7\u53d6R\u4e2d\u7684\u884c\u6570\u548c\u5217\u6570\u201d\u8fd9\u4e00\u4e3b\u9898\u7684\u8ba8\u8bba\u5df2\u5168\u90e8\u7ed3\u675f\u3002\u5982\u679c\u60a8\u5728\u5b66\u4e60\u8fc7\u7a0b\u4e2d\u9047\u5230\u4efb\u4f55\u95ee\u9898\uff0c\u6b22\u8fce\u5728\u4e0b\u65b9\u8bc4\u8bba\u533a\u7559\u8a00\u3002<\/p>\n
\u5982\u9700\u83b7\u53d6\u66f4\u591aR\u7f16\u7a0b\u76f8\u5173\u7684\u6559\u7a0b\u548c\u6587\u7ae0\uff0c\u8bf7\u6301\u7eed\u5173\u6ce8\u6211\u4eec\u7684\u66f4\u65b0\u3002<\/p>\n
\u795d\u60a8\u5b66\u4e60\u6109\u5feb\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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