{"id":180967,"date":"2024-05-08T20:46:03","date_gmt":"2024-05-08T12:46:03","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/180967.html"},"modified":"2024-05-08T20:46:08","modified_gmt":"2024-05-08T12:46:08","slug":"r%e8%af%ad%e8%a8%80%e7%9b%b4%e6%8e%a5%e7%94%a8import%e5%af%bc%e5%85%a5csv%e6%96%87%e4%bb%b6%ef%bc%8c%e5%87%ba%e7%8e%b0undefine%e6%80%8e%e4%b9%88%e5%8a%9e","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/180967.html","title":{"rendered":"R\u8bed\u8a00\u76f4\u63a5\u7528import\u5bfc\u5165CSV\u6587\u4ef6\uff0c\u51fa\u73b0undefine\u600e\u4e48\u529e"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27070413\/03736566-e967-4833-a80a-3db50efdddf9.webp\" alt=\"R\u8bed\u8a00\u76f4\u63a5\u7528import\u5bfc\u5165CSV\u6587\u4ef6\uff0c\u51fa\u73b0undefine\u600e\u4e48\u529e\" \/><\/p>\n<p><p>\u4f7f\u7528 R \u8bed\u8a00\u5bfc\u5165 CSV \u6587\u4ef6\u65f6\uff0c\u82e5\u9047\u5230 <code>undefined<\/code> \u9519\u8bef\u901a\u5e38\u8868\u660e\u51fd\u6570\u6216\u5bf9\u8c61\u672a\u88ab\u8bc6\u522b\u3002\u8981\u786e\u4fdd\u4f7f\u7528\u5408\u9002\u7684\u51fd\u6570\u3001\u6587\u4ef6\u8def\u5f84\u6b63\u786e\u3001CSV \u6587\u4ef6\u7ed3\u6784\u9002\u5f53\u3001\u5b89\u88c5\u5e76\u52a0\u8f7d\u4e86\u5fc5\u8981\u7684\u5305\u3002\u5728\u4f7f\u7528 <code>import<\/code> \u51fd\u6570\u524d\u5fc5\u987b\u52a0\u8f7d <code>rio<\/code> \u5305\uff0c\u56e0\u4e3a <code>import<\/code> \u662f\u8fd9\u4e2a\u5305\u63d0\u4f9b\u7684\u51fd\u6570\u3002\u5b89\u88c5 <code>rio<\/code> \u5305\u540e\u4f7f\u7528 <code>library(rio)<\/code> \u51fd\u6570\u5c06\u5176\u8f7d\u5165\u3002\u82e5\u8def\u5f84\u6216\u6587\u4ef6\u540d\u9519\u8bef\uff0c\u786e\u4fdd\u63d0\u4f9b\u6b63\u786e\u7684\u6587\u4ef6\u8def\u5f84\uff0c\u5305\u62ec\u6587\u4ef6\u6269\u5c55\u540d\u3002\u5982\u679c\u6587\u4ef6\u7ed3\u6784\u4e0d\u6807\u51c6\uff0c\u6bd4\u5982\u5206\u9694\u7b26\u4e0d\u662f\u9017\u53f7\uff0c\u90a3\u4e48\u9700\u8981\u5728 <code>import<\/code> \u51fd\u6570\u4e2d\u8bbe\u7f6e\u6b63\u786e\u7684 <code>sep<\/code> \u53c2\u6570\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u73af\u5883\u8bbe\u7f6e\u4e0e\u95ee\u9898\u8bca\u65ad<\/h3>\n<\/p>\n<p><p>\u5728\u6210\u529f\u5bfc\u5165 CSV \u6587\u4ef6\u4e4b\u524d\uff0c\u786e\u4fdd\u4f60\u5df2\u7ecf\u6b63\u786e\u5b89\u88c5\u5e76\u52a0\u8f7d\u4e86 <code>rio<\/code> \u5305\u3002\u8be5\u5305\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7b80\u5355\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u8bfb\u53d6\u591a\u79cd\u6570\u636e\u683c\u5f0f\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">install.packages(&quot;rio&quot;)<\/p>\n<p>library(rio)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5982\u679c\u5c1d\u8bd5\u5bfc\u5165\u6570\u636e\u65f6\u51fa\u73b0 <code>undefined<\/code> \u9519\u8bef\uff0c\u7b2c\u4e00\u4e2a\u6b65\u9aa4\u662f\u68c0\u67e5 <code>rio<\/code> \u5305\u662f\u5426\u5df2\u6b63\u786e\u52a0\u8f7d\u3002\u5982\u679c\u51fa\u73b0\u9519\u8bef\u63d0\u9192\uff0c\u901a\u5e38\u662f\u56e0\u4e3a\u67d0\u4e2a\u5bf9\u8c61\u6216\u51fd\u6570\u672a\u80fd\u6b63\u786e\u8bc6\u522b\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u6b63\u786e\u5bfc\u5165 CSV \u6587\u4ef6<\/h3>\n<\/p>\n<p><p>\u5bfc\u5165 CSV \u6587\u4ef6\u7684\u57fa\u7840\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">data &lt;- import(&quot;path\/to\/your\/file.csv&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5bf9\u8be5\u8bed\u53e5\u4fee\u6539\u53ef\u80fd\u5982\u4e0b\uff1a<\/p>\n<\/p>\n<ul>\n<li>\u786e\u4fdd\u6587\u4ef6\u8def\u5f84\u6b63\u786e\u3002\u76f8\u5bf9\u8def\u5f84\u6216\u7edd\u5bf9\u8def\u5f84\u7684\u4f7f\u7528\u9700\u8981\u6839\u636e\u6587\u4ef6\u5b9e\u9645\u4f4d\u7f6e\u6765\u786e\u5b9a\u3002<\/li>\n<li>\u8def\u5f84\u4e2d\u6587\u4ef6\u540d\u548c\u6269\u5c55\u540d\u9700\u8981\u51c6\u786e\u65e0\u8bef\u3002Linux\u7cfb\u7edf\u548cMac\u7cfb\u7edf\u533a\u5206\u6587\u4ef6\u540d\u5927\u5c0f\u5199\u3002<\/li>\n<li>\u6587\u4ef6\u5982\u679c\u4e0d\u5728\u5de5\u4f5c\u76ee\u5f55\u4e0b\uff0c\u9700\u8981\u63d0\u4f9b\u8be6\u5c3d\u7684\u6587\u4ef6\u8def\u5f84\u3002<\/li>\n<\/ul>\n<p><h3>\u4e09\u3001\u5904\u7406\u8def\u5f84\u4e0e\u6587\u4ef6\u540d\u9519\u8bef<\/h3>\n<\/p>\n<p><p>\u6587\u4ef6\u8def\u5f84\u9519\u8bef\u6216\u6587\u4ef6\u540d\u62fc\u5199\u9519\u8bef\u662f\u9047\u5230 <code>undefined<\/code> \u95ee\u9898\u65f6\u7684\u5e38\u89c1\u539f\u56e0\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u68c0\u67e5\u6587\u4ef6\u8def\u5f84<\/strong>\uff1a\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>getwd()<\/code> \u51fd\u6570\u68c0\u67e5\u5f53\u524d\u5de5\u4f5c\u76ee\u5f55\uff0c\u5e76\u786e\u4fdd\u4f60\u7684\u6587\u4ef6\u4f4d\u4e8e\u6b64\u76ee\u5f55\u4e0b\uff0c\u6216\u8005\u63d0\u4f9b\u6b63\u786e\u7684\u76f8\u5bf9\/\u7edd\u5bf9\u8def\u5f84\u3002<\/li>\n<li><strong>\u786e\u4fdd\u6587\u4ef6\u5b58\u5728<\/strong>\uff1a\u4f7f\u7528 <code>file.exists(&quot;path\/to\/your\/file.csv&quot;)<\/code> \u53ef\u4ee5\u68c0\u67e5\u6587\u4ef6\u662f\u5426\u5b58\u5728\u4e8e\u6307\u5b9a\u8def\u5f84\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001\u5904\u7406\u6587\u4ef6\u7ed3\u6784\u95ee\u9898<\/h3>\n<\/p>\n<p><p>\u6709\u65f6\u5019\uff0cCSV \u6587\u4ef6\u53ef\u80fd\u4f7f\u7528\u4e86\u975e\u6807\u51c6\u7684\u5206\u9694\u7b26\u6216\u8005\u5305\u542b\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7b80\u5355\u7684 <code>import<\/code> \u53ef\u80fd\u4e0d\u7ba1\u7528\uff0c\u4f60\u9700\u8981\u6307\u5b9a\u6b63\u786e\u7684\u5206\u9694\u7b26\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">data &lt;- import(&quot;path\/to\/your\/file.csv&quot;, sep = &quot;;&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<ul>\n<li><strong>\u68c0\u67e5\u5217\u6807\u9898<\/strong>\uff1a\u5217\u6807\u9898\u4e0d\u5e94\u5305\u542b\u4efb\u4f55\u7279\u6b8a\u5b57\u7b26\uff0c\u5e94\u907f\u514d\u4f7f\u7528\u7a7a\u683c\u3001\u70b9\u6216\u5176\u4ed6\u53ef\u80fd\u5e72\u6270\u7684\u5b57\u7b26\u3002<\/li>\n<li><strong>\u68c0\u67e5\u6570\u636e\u683c\u5f0f<\/strong>\uff1a\u786e\u8ba4 CSV \u6587\u4ef6\u4e2d\u7684\u6570\u636e\u662f\u5426\u6709\u4e0d\u89c4\u5219\u7684\u683c\u5f0f\uff0c\u5982\u6df7\u5408\u6587\u672c\u4e0e\u6570\u5b57\uff0c\u786e\u4fdd\u6570\u636e\u6e05\u6670\u89c4\u6574\u3002<\/li>\n<\/ul>\n<p><h3>\u4e94\u3001\u9ad8\u7ea7\u5bfc\u5165\u8bbe\u7f6e<\/h3>\n<\/p>\n<p><p>\u6709\u65f6\u5019\uff0c\u6807\u51c6\u7684\u5bfc\u5165\u8bbe\u7f6e\u53ef\u80fd\u4e0d\u8db3\u4ee5\u5e94\u5bf9\u6240\u6709\u95ee\u9898\uff0c\u5982\u5b57\u7b26\u7f16\u7801\u95ee\u9898\u6216\u8005\u542b\u6709\u7279\u6b8a\u5b57\u7b26\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n<ul>\n<li><strong>\u8bbe\u7f6e\u5b57\u7b26\u7f16\u7801<\/strong>\uff1a\u7279\u522b\u662f\u5f53\u5904\u7406\u6765\u81ea\u4e0d\u540c\u56fd\u5bb6\u7684\u6570\u636e\u65f6\uff0c\u5b57\u7b26\u7f16\u7801\u53ef\u80fd\u5bfc\u81f4\u8bfb\u53d6\u529f\u80fd\u65e0\u6cd5\u8bc6\u522b\u6709\u6548\u6570\u636e\u3002\u53ef\u4ee5\u901a\u8fc7 <code>fileEncoding<\/code> \u53c2\u6570\u8bbe\u7f6e\u3002<\/li>\n<li><strong>\u8df3\u8fc7\u4e0d\u89c4\u5219\u7684\u884c<\/strong>\uff1a\u5982\u679c\u4f60\u7684 CSV \u6587\u4ef6\u4e2d\u6709\u6807\u9898\u6216\u5176\u4ed6\u8bf4\u660e\u6027\u6587\u672c\u884c\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>skip<\/code> \u53c2\u6570\u6307\u5b9a\u8df3\u8fc7\u524d\u51e0\u884c\u3002<\/li>\n<\/ul>\n<p><pre><code class=\"language-R\">data &lt;- import(&quot;path\/to\/your\/file.csv&quot;, skip = 1, fileEncoding = &quot;UTF-8&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u516d\u3001\u4f7f\u7528\u66ff\u4ee3\u51fd\u6570\u5bfc\u5165\u6570\u636e<\/h3>\n<\/p>\n<p><p>\u5982\u679c <code>import<\/code> \u51fd\u6570\u65e0\u6cd5\u89e3\u51b3\u95ee\u9898\uff0c\u4f60\u53ef\u4ee5\u5c1d\u8bd5 R \u8bed\u8a00\u4e2d\u5176\u4ed6\u4e13\u95e8\u7528\u4e8e\u8bfb\u53d6 CSV \u6587\u4ef6\u7684\u51fd\u6570\uff0c\u5982 <code>read.csv()<\/code>\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-R\">data &lt;- read.csv(&quot;path\/to\/your\/file.csv&quot;, header = TRUE, sep = &quot;,&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u8fd9\u91cc <code>header = TRUE<\/code> \u5047\u8bbe\u7b2c\u4e00\u884c\u4e3a\u5217\u540d\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8c03\u6574 <code>sep<\/code> \u53c2\u6570\u6765\u5339\u914d\u4e0d\u540c\u7684\u5206\u9694\u7b26\u3002<\/p>\n<\/p>\n<p><h3>\u4e03\u3001\u6545\u969c\u6392\u9664<\/h3>\n<\/p>\n<p><p>\u6392\u67e5 <code>undefined<\/code> \u95ee\u9898\u65f6\uff0c\u9010\u6b65\u9a8c\u8bc1\u53ef\u80fd\u7684\u539f\u56e0\uff1a<\/p>\n<\/p>\n<ul>\n<li><strong>\u68c0\u67e5 R \u4f1a\u8bdd<\/strong>\uff1a\u6709\u65f6\u5019\u91cd\u542f R \u4f1a\u8bdd\u80fd\u591f\u89e3\u51b3\u5076\u53d1\u7684\u95ee\u9898\u3002<\/li>\n<li><strong>\u68c0\u67e5\u5305\u51b2\u7a81<\/strong>\uff1a\u5176\u4ed6\u8f7d\u5165\u7684\u5305\u53ef\u80fd\u4f1a\u4e0e <code>rio<\/code> \u51b2\u7a81\uff0c\u5c1d\u8bd5\u5728\u5e72\u51c0\u7684\u4f1a\u8bdd\u73af\u5883\u4e2d\u4ec5\u52a0\u8f7d <code>rio<\/code> \u5305\u540e\u518d\u6b21\u5c1d\u8bd5\u3002<\/li>\n<li><strong>\u67e5\u770b\u9519\u8bef\u6d88\u606f<\/strong>\uff1a\u9519\u8bef\u6d88\u606f\u901a\u5e38\u4f1a\u63d0\u4f9b\u5173\u4e8e\u95ee\u9898\u7684\u91cd\u8981\u7ebf\u7d22\u3002\u8be6\u7ec6\u9605\u8bfb\u548c\u641c\u7d22\u76f8\u5e94\u7684\u9519\u8bef\u4fe1\u606f\u53ef\u4ee5\u5e2e\u52a9\u627e\u5230\u89e3\u51b3\u95ee\u9898\u7684\u65b9\u5411\u3002<\/li>\n<\/ul>\n<p><h3>\u516b\u3001\u7ed3\u8bba<\/h3>\n<\/p>\n<p><p>\u603b\u800c\u8a00\u4e4b\uff0c\u5982\u679c\u5728\u4f7f\u7528 R \u8bed\u8a00\u7684 <code>import<\/code> \u51fd\u6570\u6765\u5bfc\u5165 CSV \u6587\u4ef6\u65f6\u51fa\u73b0 <code>undefined<\/code> \u95ee\u9898\uff0c\u4f60\u9700\u8981<strong>\u68c0\u67e5 <code>rio<\/code> \u5305\u7684\u5b89\u88c5\u4e0e\u52a0\u8f7d\u3001\u6587\u4ef6\u8def\u5f84\u4e0e\u540d\u79f0\u7684\u51c6\u786e\u6027\u3001CSV \u6587\u4ef6\u7684\u7ed3\u6784<\/strong>\u4ee5\u53ca\u662f\u5426\u9700\u8981\u5176\u4ed6\u9ad8\u7ea7\u8bbe\u7f6e\u6765\u6b63\u786e\u8bfb\u53d6\u6570\u636e\u3002\u901a\u8fc7\u9010\u4e00\u6392\u67e5\u8fd9\u4e9b\u6f5c\u5728\u95ee\u9898\uff0c\u901a\u5e38\u53ef\u4ee5\u89e3\u51b3\u5bfc\u5165\u6570\u636e\u65f6\u9047\u5230\u7684\u95ee\u9898\u3002\u5982\u679c\u4e0a\u8ff0\u6240\u6709\u529e\u6cd5\u90fd\u672a\u80fd\u89e3\u51b3\u95ee\u9898\uff0c\u90a3\u4e48\u5bfb\u6c42\u793e\u533a\u652f\u6301\u6216\u8005\u4e13\u4e1a\u4eba\u58eb\u534f\u52a9\u4e5f\u662f\u4e00\u4e2a\u5f88\u597d\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. 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