{"id":65587,"date":"2023-12-12T23:49:12","date_gmt":"2023-12-12T15:49:12","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=65587"},"modified":"2023-12-12T23:49:20","modified_gmt":"2023-12-12T15:49:20","slug":"r%e8%af%ad%e8%a8%80%e6%8a%a5%e9%94%99%ef%bc%8c%e4%bb%80%e4%b9%88%e6%98%af%e4%b8%8b%e6%a0%87%e5%87%ba%e7%95%8c","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/65587.html","title":{"rendered":"R\u8bed\u8a00\u62a5\u9519\uff0c\u4ec0\u4e48\u662f\u4e0b\u6807\u51fa\u754c"},"content":{"rendered":"\n<blockquote class=\"wp-block-quote\">\n<p><span>\u5728R\u8bed\u8a00\u4e2d\uff0c\u5f53\u4f60\u8bd5\u56fe\u8bbf\u95ee\u6570\u7ec4\u3001\u5411\u91cf\u6216\u5217\u8868\u7b49\u6570\u636e\u7ed3\u6784\u65f6\uff0c\u5982\u679c\u4f7f\u7528\u4e86\u8d85\u51fa\u5176\u8303\u56f4\u7684\u7d22\u5f15\uff0c\u5c31\u4f1a\u5bfc\u81f4 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u7684\u9519\u8bef\u3002\u8fd9\u79cd\u9519\u8bef\u8868\u793a\u4f60\u5c1d\u8bd5\u8bbf\u95ee\u7684\u5143\u7d20\u4f4d\u7f6e\u8d85\u8fc7\u4e86\u6570\u636e\u7ed3\u6784\u7684\u6709\u6548\u8303\u56f4\uff0c\u53ef\u80fd\u662f\u592a\u5c0f\u6216\u592a\u5927\u7684\u7d22\u5f15\u503c\u3002<\/span><div><span><\/span><\/div><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">1. R\u8bed\u8a00\u62a5\u9519 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u7684\u57fa\u672c\u4ecb\u7ecd<\/h2>\n\n\n\n<p>\u5728R\u8bed\u8a00\u4e2d\uff0c\u5f53\u4f60\u8bd5\u56fe\u8bbf\u95ee\u6570\u7ec4\u3001\u5411\u91cf\u6216\u5217\u8868\u7b49\u6570\u636e\u7ed3\u6784\u65f6\uff0c\u5982\u679c\u4f7f\u7528\u4e86\u8d85\u51fa\u5176\u8303\u56f4\u7684\u7d22\u5f15\uff0c\u5c31\u4f1a\u5bfc\u81f4 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u7684\u9519\u8bef\u3002\u8fd9\u79cd\u9519\u8bef\u8868\u793a\u4f60\u5c1d\u8bd5\u8bbf\u95ee\u7684\u5143\u7d20\u4f4d\u7f6e\u8d85\u8fc7\u4e86\u6570\u636e\u7ed3\u6784\u7684\u6709\u6548\u8303\u56f4\uff0c\u53ef\u80fd\u662f\u592a\u5c0f\u6216\u592a\u5927\u7684\u7d22\u5f15\u503c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2. R\u8bed\u8a00\u62a5\u9519 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u7684\u539f\u56e0<\/h2>\n\n\n\n<p>&#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u9519\u8bef\u901a\u5e38\u53d1\u751f\u5728\u4ee5\u4e0b\u60c5\u51b5\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u7d22\u5f15\u503c\u592a\u5c0f\uff1a<\/strong> \u8bd5\u56fe\u8bbf\u95ee\u4e00\u4e2a\u8d1f\u6570\u7d22\u5f15\u6216\u96f6\u7d22\u5f15\uff0c\u800c\u6570\u636e\u7ed3\u6784\u4e0d\u652f\u6301\u8fd9\u6837\u7684\u7d22\u5f15\u3002<\/li>\n\n\n\n<li><strong>\u7d22\u5f15\u503c\u592a\u5927\uff1a<\/strong> \u5c1d\u8bd5\u8bbf\u95ee\u4e00\u4e2a\u8d85\u8fc7\u6570\u7ec4\u6216\u5411\u91cf\u957f\u5ea6\u7684\u7d22\u5f15\uff0c\u5bfc\u81f4\u8d85\u51fa\u6570\u636e\u7ed3\u6784\u7684\u6709\u6548\u8303\u56f4\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">3. R\u8bed\u8a00\u62a5\u9519 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u7684\u5904\u7406\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u4e3a\u4e86\u907f\u514d &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u9519\u8bef\uff0c\u4f60\u53ef\u4ee5\u91c7\u53d6\u4ee5\u4e0b\u63aa\u65bd\uff1a<\/p>\n\n\n\n<ul>\n<li><strong>\u68c0\u67e5\u7d22\u5f15\u8303\u56f4\uff1a<\/strong> \u5728\u8bbf\u95ee\u6570\u7ec4\u3001\u5411\u91cf\u6216\u5217\u8868\u5143\u7d20\u4e4b\u524d\uff0c\u786e\u4fdd\u7d22\u5f15\u503c\u5728\u6709\u6548\u8303\u56f4\u5185\u3002\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\u6216\u9884\u5904\u7406\u4ee3\u7801\u6765\u8fdb\u884c\u7d22\u5f15\u8303\u56f4\u7684\u68c0\u67e5\u3002<\/li>\n\n\n\n<li><strong>\u6ce8\u610fR\u7684\u7d22\u5f15\u4ece1\u5f00\u59cb\uff1a<\/strong> \u5728R\u8bed\u8a00\u4e2d\uff0c\u6570\u7ec4\u548c\u5411\u91cf\u7684\u7d22\u5f15\u662f\u4ece1\u5f00\u59cb\u7684\uff0c\u800c\u4e0d\u662f\u4ece0\u5f00\u59cb\u3002\u786e\u4fdd\u4f60\u7684\u7d22\u5f15\u7b26\u5408R\u8bed\u8a00\u7684\u60ef\u4f8b\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">4. R\u8bed\u8a00\u62a5\u9519 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u7684\u793a\u4f8b<\/h2>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684R\u8bed\u8a00\u793a\u4f8b\uff0c\u5c55\u793a\u4e86 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u9519\u8bef\u7684\u60c5\u51b5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a5\u7684\u5411\u91cf\nmy_vector &lt;- c(10, 20, 30, 40, 50)\n\n# \u5c1d\u8bd5\u8bbf\u95ee\u8d85\u51fa\u8303\u56f4\u7684\u7d22\u5f15\nindex_out_of_bounds &lt;- my_vector&#091;6]<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u8bd5\u56fe\u8bbf\u95ee\u7d22\u5f15\u4e3a6\u7684\u5143\u7d20\uff0c\u800c\u5b9e\u9645\u4e0a\u5411\u91cf <code>my_vector<\/code> \u53ea\u67095\u4e2a\u5143\u7d20\uff0c\u5bfc\u81f4 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u9519\u8bef\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5. R\u8bed\u8a00\u62a5\u9519 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u7684\u5904\u7406\u7ecf\u9a8c<\/h2>\n\n\n\n<p>\u5728\u5904\u7406 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u9519\u8bef\u65f6\uff0c\u5efa\u8bae\u5728\u7f16\u5199\u4ee3\u7801\u65f6\u591a\u52a0\u6ce8\u610f\u7d22\u5f15\u503c\u7684\u5408\u6cd5\u6027\uff0c\u517b\u6210\u826f\u597d\u7684\u7d22\u5f15\u68c0\u67e5\u4e60\u60ef\uff0c\u4ee5\u786e\u4fdd\u4ee3\u7801\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u6b64\u5916\uff0c\u53ef\u4ee5\u4f7f\u7528\u8c03\u8bd5\u5de5\u5177\u6765\u8ddf\u8e2a\u4ee3\u7801\u6267\u884c\u8fc7\u7a0b\uff0c\u5e2e\u52a9\u5b9a\u4f4d\u5e76\u89e3\u51b3 &#8220;\u4e0b\u6807\u51fa\u754c&#8221; \u9519\u8bef\u3002<\/p>\n\n\n\n<p><img fetchpriority=\"high\" decoding=\"async\" width=\"484\" height=\"300\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/12\/778941-R\u8bed\u8a00\u62a5\u9519\u4ec0\u4e48\u662f\u4e0b\u6807\u51fa\u754c.png?x-oss-process=image\/auto-orient,1\/format,webp\" class=\"aligncenter\" alt=\"R\u8bed\u8a00\u62a5\u9519\uff0c\u4ec0\u4e48\u662f\u4e0b\u6807\u51fa\u754c\" \/><\/p>\n\n\n\n<p><strong>\u5e38\u89c1\u95ee\u7b54\uff1a<\/strong><\/p>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u5728R\u8bed\u8a00\u4e2d\uff0c\u4ec0\u4e48\u662f\u201c\u4e0b\u6807\u51fa\u754c\u201d\u9519\u8bef\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u5728R\u8bed\u8a00\u4e2d\uff0c\u5f53\u5c1d\u8bd5\u4f7f\u7528\u6570\u7ec4\u3001\u5411\u91cf\u6216\u6570\u636e\u6846\u7b49\u6570\u636e\u7ed3\u6784\u7684\u7d22\u5f15\u8bbf\u95ee\u5143\u7d20\u65f6\uff0c\u5982\u679c\u63d0\u4f9b\u7684\u7d22\u5f15\u503c\u8d85\u51fa\u4e86\u6570\u636e\u7ed3\u6784\u7684\u6709\u6548\u8303\u56f4\uff0c\u5c31\u4f1a\u5bfc\u81f4\u201c\u4e0b\u6807\u51fa\u754c\u201d\uff08Index Out of Bounds\uff09\u7684\u9519\u8bef\u3002\u8fd9\u8868\u793a\u5c1d\u8bd5\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u4f4d\u7f6e\uff0c\u901a\u5e38\u662f\u7531\u4e8e\u63d0\u4f9b\u7684\u7d22\u5f15\u503c\u592a\u5927\u6216\u592a\u5c0f\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u5982\u4f55\u9632\u6b62\u5728R\u8bed\u8a00\u4e2d\u53d1\u751f\u201c\u4e0b\u6807\u51fa\u754c\u201d\u9519\u8bef\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u4e3a\u4e86\u9632\u6b62\u201c\u4e0b\u6807\u51fa\u754c\u201d\u9519\u8bef\uff0c\u5e94\u786e\u4fdd\u5728\u4f7f\u7528\u7d22\u5f15\u8bbf\u95ee\u6570\u636e\u7ed3\u6784\u65f6\uff0c\u63d0\u4f9b\u7684\u7d22\u5f15\u503c\u5728\u6709\u6548\u8303\u56f4\u5185\u3002\u4f7f\u7528\u51fd\u6570\u5982 <code>length()<\/code> \u83b7\u53d6\u6570\u636e\u7ed3\u6784\u7684\u957f\u5ea6\uff0c\u4ee5\u786e\u4fdd\u7d22\u5f15\u4e0d\u8d85\u51fa\u8303\u56f4\u3002\u6b64\u5916\uff0c\u8981\u6ce8\u610fR\u8bed\u8a00\u4e2d\u7d22\u5f15\u662f\u4ece1\u5f00\u59cb\u7684\uff0c\u800c\u4e0d\u662f\u4ece0\u5f00\u59cb\uff0c\u56e0\u6b64\u8981\u786e\u4fdd\u4f7f\u7528\u6b63\u786e\u7684\u7d22\u5f15\u8d77\u59cb\u4f4d\u7f6e\u3002<\/li>\n<\/ul>\n\n\n\n<ul>\n<li>\u95ee\uff1a\u6211\u9047\u5230\u201c\u4e0b\u6807\u51fa\u754c\u201d\u9519\u8bef\u5e94\u8be5\u5982\u4f55\u8c03\u8bd5\u548c\u4fee\u590d\uff1f<\/li>\n\n\n\n<li>\u7b54\uff1a\u5f53\u9047\u5230\u201c\u4e0b\u6807\u51fa\u754c\u201d\u9519\u8bef\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u8c03\u8bd5\u548c\u4fee\u590d\uff1a\u68c0\u67e5\u7d22\u5f15\u7684\u53d6\u503c\u8303\u56f4\uff0c\u786e\u4fdd\u4e0d\u8d85\u8fc7\u6570\u636e\u7ed3\u6784\u7684\u957f\u5ea6\uff1b\u4f7f\u7528\u51fd\u6570\u5982 <code>length()<\/code> \u83b7\u53d6\u6570\u636e\u7ed3\u6784\u7684\u957f\u5ea6\uff0c\u786e\u4fdd\u7d22\u5f15\u503c\u5728\u6709\u6548\u8303\u56f4\u5185\uff1b\u68c0\u67e5\u7d22\u5f15\u7684\u8d77\u59cb\u503c\uff0c\u786e\u4fdd\u4f7f\u7528\u6b63\u786e\u7684\u7d22\u5f15\u8d77\u59cb\u4f4d\u7f6e\uff08R\u4e2d\u7d22\u5f15\u4ece1\u5f00\u59cb\uff09\uff1b\u53ef\u4ee5\u4f7f\u7528\u6761\u4ef6\u8bed\u53e5\uff0c\u5982 <code>if<\/code>\uff0c\u5728\u8bbf\u95ee\u524d\u5224\u65ad\u7d22\u5f15\u662f\u5426\u5728\u6709\u6548\u8303\u56f4\u5185\uff0c\u4ee5\u907f\u514d\u9519\u8bef\u3002\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u53ef\u4ee5\u8bc6\u522b\u95ee\u9898\u7684\u6839\u672c\u539f\u56e0\u5e76\u4fee\u590d\u201c\u4e0b\u6807\u51fa\u754c\u201d\u9519\u8bef\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"\u5728R\u8bed\u8a00\u4e2d\uff0c\u5f53\u4f60\u8bd5\u56fe\u8bbf\u95ee\u6570\u7ec4\u3001\u5411\u91cf\u6216\u5217\u8868\u7b49\u6570\u636e\u7ed3\u6784\u65f6\uff0c\u5982\u679c\u4f7f\u7528\u4e86\u8d85\u51fa\u5176\u8303\u56f4\u7684\u7d22\u5f15\uff0c\u5c31\u4f1a\u5bfc\u81f4 &#8220;\u4e0b\u6807 [&hellip;]","protected":false},"author":4,"featured_media":65590,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[3785,3786,377],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/65587"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=65587"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/65587\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/65590"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=65587"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=65587"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=65587"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}