{"id":382,"date":"2023-03-15T03:25:37","date_gmt":"2023-03-15T03:25:37","guid":{"rendered":"https:\/\/yunshangtulv.com.cn\/?p=382"},"modified":"2023-03-15T03:26:28","modified_gmt":"2023-03-15T03:26:28","slug":"%e5%90%91%e9%87%8f%e8%af%a6%e8%a7%a3%e5%8f%8a%e5%ba%94%e7%94%a8%e4%b8%be%e4%be%8b","status":"publish","type":"post","link":"https:\/\/yunshangtulv.com.cn\/?p=382","title":{"rendered":"\u5411\u91cf\u8be6\u89e3\u53ca\u5e94\u7528\u4e3e\u4f8b"},"content":{"rendered":"<p>\u5411\u91cf\u662f\u6700\u57fa\u672c\u4e5f\u662f\u6700\u91cd\u8981\u7684\u6570\u636e\u7ed3\u6784\u4e4b\u4e00\u3002\u5411\u91cf\u662fR\u8bed\u8a00\u4e2d\u6700\u57fa\u672c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5b83\u662f\u4e00\u7ec4\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u7684\u6709\u5e8f\u96c6\u5408\u3002R\u8bed\u8a00\u4e2d\u7684\u5411\u91cf\u53ef\u4ee5\u5305\u542b\u6570\u5b57\u3001\u5b57\u7b26\u3001\u903b\u8f91\u503c\u7b49\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<p>\u5728R\u8bed\u8a00\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>c()<\/code>\u51fd\u6570\u521b\u5efa\u5411\u91cf\uff0c\u8fd9\u4e2a\u51fd\u6570\u8868\u793acombine\uff08\u5408\u5e76\uff09\uff0c\u53ef\u4ee5\u5c06\u591a\u4e2a\u5143\u7d20\u7ec4\u5408\u6210\u4e00\u4e2a\u5411\u91cf\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u521b\u5efa\u6570\u5b57\u5411\u91cf\u7684\u4f8b\u5b50\uff1a<\/p>\n<pre class=\"corepress-code-pre\"><code># \u521b\u5efa\u6570\u5b57\u5411\u91cf\r\nx &lt;- c(1, 2, 3, 4, 5)\r\nprint(x)\r\n<\/code><\/pre>\n<p><span>\u8f93\u51fa\u7ed3\u679c\uff1a<\/span><\/p>\n<pre class=\"corepress-code-pre\"><code>[1] 1 2 3 4 5\r\n<\/code><\/pre>\n<p><span>\u53ef\u4ee5\u4f7f\u7528<\/span><code>class()<\/code><span>\u51fd\u6570\u6765\u68c0\u67e5\u4e00\u4e2a\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u68c0\u67e5\u4e0a\u9762\u521b\u5efa\u7684\u5411\u91cfx\u7684\u6570\u636e\u7c7b\u578b\u7684\u4f8b\u5b50\uff1a<\/span><\/p>\n<pre class=\"corepress-code-pre\"><code># \u68c0\u67e5x\u7684\u6570\u636e\u7c7b\u578b\r\nprint(class(x))\r\n<\/code><\/pre>\n<p><span>\u8f93\u51fa\u7ed3\u679c\uff1a<\/span><\/p>\n<pre class=\"corepress-code-pre\"><code>[1] \"numeric\"<\/code><\/pre>\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u521b\u5efa\u5b57\u7b26\u5411\u91cf\u7684\u4f8b\u5b50\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-R\"><span class=\"hljs-comment\"># \u521b\u5efa\u5b57\u7b26\u5411\u91cf<\/span><br \/>\ny <span class=\"hljs-operator\">&lt;-<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-string\">\"apple\"<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-string\">\"banana\"<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-string\">\"orange\"<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\nprint<span class=\"hljs-punctuation\">(<\/span>y<span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-csharp\">[<span class=\"hljs-meta\">1<\/span>] <span class=\"hljs-string\">\"apple\"<\/span>  <span class=\"hljs-string\">\"banana\"<\/span> <span class=\"hljs-string\">\"orange\"<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u53ef\u4ee5\u4f7f\u7528<code>length()<\/code>\u51fd\u6570\u6765\u83b7\u53d6\u4e00\u4e2a\u5411\u91cf\u7684\u957f\u5ea6\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u83b7\u53d6\u5411\u91cfy\u7684\u957f\u5ea6\u7684\u4f8b\u5b50\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-R\"><span class=\"hljs-comment\"># \u83b7\u53d6y\u7684\u957f\u5ea6<\/span><br \/>\nprint<span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-built_in\">length<\/span><span class=\"hljs-punctuation\">(<\/span>y<span class=\"hljs-punctuation\">)<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-csharp\">[<span class=\"hljs-meta\">1<\/span>] <span class=\"hljs-number\">3<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u5411\u91cf\u53ef\u4ee5\u8fdb\u884c\u7b97\u672f\u8fd0\u7b97\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u5411\u91cf\u52a0\u6cd5\u7684\u4f8b\u5b50\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-R\"><span class=\"hljs-comment\"># \u5411\u91cf\u52a0\u6cd5<\/span><br \/>\na <span class=\"hljs-operator\">&lt;-<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-number\">1<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-number\">2<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-number\">3<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\nb <span class=\"hljs-operator\">&lt;-<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-number\">4<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-number\">5<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-number\">6<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\n<span class=\"hljs-built_in\">c<\/span> <span class=\"hljs-operator\">&lt;-<\/span> a <span class=\"hljs-operator\">+<\/span> b<br \/>\nprint<span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-csharp\">[<span class=\"hljs-meta\">1<\/span>] <span class=\"hljs-number\">5<\/span> <span class=\"hljs-number\">7<\/span> <span class=\"hljs-number\">9<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u5411\u91cf\u8fd8\u53ef\u4ee5\u8fdb\u884c\u903b\u8f91\u8fd0\u7b97\uff0c\u4e0b\u9762\u662f\u4e00\u4e2a\u5411\u91cf\u903b\u8f91\u8fd0\u7b97\u7684\u4f8b\u5b50\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-R\"><span class=\"hljs-comment\"># \u5411\u91cf\u903b\u8f91\u8fd0\u7b97<\/span><br \/>\na <span class=\"hljs-operator\">&lt;-<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-literal\">TRUE<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-literal\">FALSE<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-literal\">TRUE<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\nb <span class=\"hljs-operator\">&lt;-<\/span> <span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-literal\">FALSE<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-literal\">TRUE<\/span><span class=\"hljs-punctuation\">,<\/span> <span class=\"hljs-literal\">TRUE<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\n<span class=\"hljs-built_in\">c<\/span> <span class=\"hljs-operator\">&lt;-<\/span> a <span class=\"hljs-operator\">&amp;<\/span> b<br \/>\nprint<span class=\"hljs-punctuation\">(<\/span><span class=\"hljs-built_in\">c<\/span><span class=\"hljs-punctuation\">)<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n<div class=\"bg-black mb-4 rounded-md\">\n<div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-graphql\"><span class=\"hljs-punctuation\">[<\/span><span class=\"hljs-number\">1<\/span><span class=\"hljs-punctuation\">]<\/span> <span class=\"hljs-literal\">FALSE<\/span> <span class=\"hljs-literal\">FALSE<\/span>  <span class=\"hljs-literal\">TRUE<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p>\u9664\u4e86\u57fa\u672c\u7684\u5411\u91cf\u64cd\u4f5c\u5916\uff0cR\u8bed\u8a00\u8fd8\u63d0\u4f9b\u4e86\u8bb8\u591a\u9ad8\u7ea7\u7684\u5411\u91cf\u64cd\u4f5c\uff0c\u4f8b\u5982\u5411\u91cf\u7684\u5207\u7247\u3001\u5411\u91cf\u7684\u6392\u5e8f\u3001\u5411\u91cf\u7684\u7b5b\u9009\u7b49\u7b49\u3002\u719f\u7ec3\u638c\u63e1\u5411\u91cf\u7684\u64cd\u4f5c\u5bf9\u4e8e\u4f7f\u7528R\u8bed\u8a00\u8fdb\u884c\u6570\u636e\u5206\u6790\u548c\u53ef\u89c6\u5316\u975e\u5e38\u91cd\u8981\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5411\u91cf\u662f\u6700\u57fa\u672c\u4e5f\u662f\u6700\u91cd\u8981\u7684\u6570\u636e\u7ed3\u6784\u4e4b\u4e00\u3002\u5411\u91cf\u662fR\u8bed\u8a00\u4e2d\u6700\u57fa\u672c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5b83\u662f\u4e00\u7ec4\u76f8\u540c\u6570\u636e\u7c7b\u578b\u7684\u5143\u7d20\u7684\u6709\u5e8f\u96c6\u5408\u3002R [&hellip;]<\/p>\n","protected":false},"author":111,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-382","post","type-post","status-publish","format-standard","hentry","category-r"],"_links":{"self":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/users\/111"}],"replies":[{"embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=382"}],"version-history":[{"count":0,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/382\/revisions"}],"wp:attachment":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}