{"id":424,"date":"2023-04-10T22:52:48","date_gmt":"2023-04-10T22:52:48","guid":{"rendered":"https:\/\/yunshangtulv.com.cn\/?p=424"},"modified":"2023-04-10T22:57:23","modified_gmt":"2023-04-10T22:57:23","slug":"r%e8%af%ad%e8%a8%80%e5%9f%ba%e7%a1%80%e7%bb%9f%e8%ae%a1%e7%a4%ba%e4%be%8b%ef%bc%9a%e7%ba%bf%e6%80%a7%e5%9b%9e%e5%bd%92","status":"publish","type":"post","link":"https:\/\/yunshangtulv.com.cn\/?p=424","title":{"rendered":"R\u8bed\u8a00\u57fa\u7840\u7edf\u8ba1\u793a\u4f8b\uff1a\u7ebf\u6027\u56de\u5f52"},"content":{"rendered":"
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\u7ebf\u6027\u56de\u5f52\u662f\u4e00\u79cd\u7edf\u8ba1\u65b9\u6cd5\uff0c\u7528\u4e8e\u7814\u7a76\u81ea\u53d8\u91cf\uff08X\uff09\u4e0e\u56e0\u53d8\u91cf\uff08Y\uff09\u4e4b\u95f4\u7684\u7ebf\u6027\u5173\u7cfb\u3002R\u8bed\u8a00\u4e2d\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u8fdb\u884c\u7ebf\u6027\u56de\u5f52\u5206\u6790\uff0c\u5176\u4e2d\u6700\u5e38\u7528\u7684\u662flm()<\/code>\u51fd\u6570\u3002\u4e0b\u9762\uff0c\u6211\u5c06\u8be6\u7ec6\u89e3\u91ca\u7ebf\u6027\u56de\u5f52\u7684\u6982\u5ff5\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e2a\u5e94\u7528\u5b9e\u4f8b\u3002<\/p>\n

\u7ebf\u6027\u56de\u5f52\u57fa\u672c\u6982\u5ff5\uff1a<\/h3>\n

\u7ebf\u6027\u56de\u5f52\u6a21\u578b\u5047\u8bbe\u81ea\u53d8\u91cf\u548c\u56e0\u53d8\u91cf\u4e4b\u95f4\u5b58\u5728\u7ebf\u6027\u5173\u7cfb\uff0c\u5373\uff1a Y = \u03b20 + \u03b21 * X1 + \u03b22 * X2 + ... + \u03b2n * Xn + \u03b5 \u5176\u4e2d\uff0cY\u662f\u56e0\u53d8\u91cf\uff0cX1\u3001X2...Xn\u662f\u81ea\u53d8\u91cf\uff0c\u03b20\u662f\u622a\u8ddd\uff0c\u03b21\u3001\u03b22...\u03b2n\u662f\u56de\u5f52\u7cfb\u6570\uff0c\u03b5\u662f\u968f\u673a\u8bef\u5dee\u9879\u3002<\/p>\n

R\u8bed\u8a00\u5b9e\u73b0\u7ebf\u6027\u56de\u5f52\u5206\u6790\uff1a<\/h3>\n

\u5047\u8bbe\u6211\u4eec\u8981\u5206\u6790\u81ea\u53d8\u91cfX\uff08\u5982\u5e7f\u544a\u652f\u51fa\uff09\u5bf9\u56e0\u53d8\u91cfY\uff08\u5982\u4ea7\u54c1\u9500\u552e\u989d\uff09\u7684\u5f71\u54cd\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n

\u51c6\u5907\u6570\u636e\u96c6\uff1a<\/h4>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6570\u636e\u96c6data<\/code>\uff0c\u5176\u4e2d\u5305\u542b\u4e24\u5217\uff1aad_spend<\/code>\uff08\u5e7f\u544a\u652f\u51fa\uff09\u548csales<\/code>\uff08\u4ea7\u54c1\u9500\u552e\u989d\uff09\u3002<\/p>\n

\n
<\/div>\n
# \u793a\u4f8b\u6570\u636e<\/span>
\ndata <-<\/span> data.frame(<\/span>
\n ad_spend =<\/span> c<\/span>(<\/span>100<\/span>,<\/span> 200<\/span>,<\/span> 300<\/span>,<\/span> 400<\/span>,<\/span> 500<\/span>)<\/span>,<\/span>
\n sales =<\/span> c<\/span>(<\/span>150<\/span>,<\/span> 250<\/span>,<\/span> 310<\/span>,<\/span> 450<\/span>,<\/span> 510<\/span>)<\/span>
\n)<\/span>
\n<\/code><\/div>\n<\/div>\n

\u6784\u5efa\u7ebf\u6027\u56de\u5f52\u6a21\u578b\uff1a<\/h4>\n

\u4f7f\u7528lm()<\/code>\u51fd\u6570\u6784\u5efa\u7ebf\u6027\u56de\u5f52\u6a21\u578b\uff0c\u5e76\u5c06\u7ed3\u679c\u5b58\u50a8\u5728model<\/code>\u4e2d\u3002<\/p>\n

\n
<\/div>\n
model <-<\/span> lm(<\/span>sales ~<\/span> ad_spend,<\/span> data =<\/span> data)<\/span>
\n<\/code><\/div>\n<\/div>\n

\u67e5\u770b\u6a21\u578b\u6458\u8981\uff1a<\/h4>\n

\u4f7f\u7528summary()<\/code>\u51fd\u6570\u67e5\u770b\u6a21\u578b\u6458\u8981\uff0c\u5305\u62ec\u56de\u5f52\u7cfb\u6570\u3001R\u5e73\u65b9\u503c\u3001F\u7edf\u8ba1\u91cf\u7b49\u3002<\/p>\n

\n
<\/div>\n
summary(<\/span>model)<\/span>
\n<\/code><\/div>\n<\/div>\n

\u9884\u6d4b\uff1a<\/h4>\n

\u4f7f\u7528predict()<\/code>\u51fd\u6570\uff0c\u6839\u636e\u5df2\u5efa\u7acb\u7684\u6a21\u578b\u8fdb\u884c\u9884\u6d4b\u3002\u5047\u8bbe\u6211\u4eec\u8981\u9884\u6d4b\u5e7f\u544a\u652f\u51fa\u4e3a600\u65f6\u7684\u4ea7\u54c1\u9500\u552e\u989d\u3002<\/p>\n

\n
<\/div>\n
new_data <-<\/span> data.frame(<\/span>ad_spend =<\/span> 600<\/span>)<\/span>
\nprediction <-<\/span> predict(<\/span>model,<\/span> newdata =<\/span> new_data)<\/span>
\nprint(<\/span>prediction)<\/span>
\n<\/code><\/div>\n<\/div>\n

\u901a\u8fc7\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u6211\u4eec\u53ef\u4ee5\u5efa\u7acb\u4e00\u4e2a\u7b80\u5355\u7684\u7ebf\u6027\u56de\u5f52\u6a21\u578b\uff0c\u5206\u6790\u5e7f\u544a\u652f\u51fa\u4e0e\u4ea7\u54c1\u9500\u552e\u989d\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5e76\u8fdb\u884c\u9884\u6d4b\u3002\u8bf7\u6ce8\u610f\uff0c\u7ebf\u6027\u56de\u5f52\u5206\u6790\u7684\u6709\u6548\u6027\u53d6\u51b3\u4e8e\u6570\u636e\u7684\u8d28\u91cf\u548c\u6a21\u578b\u7684\u5047\u8bbe\u662f\u5426\u6ee1\u8db3\uff08\u5982\u7ebf\u6027\u5173\u7cfb\u3001\u8bef\u5dee\u9879\u7684\u72ec\u7acb\u6027\u7b49\uff09\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8bf7\u786e\u4fdd\u5bf9\u6570\u636e\u8fdb\u884c\u9002\u5f53\u7684\u63a2\u7d22\u6027\u6570\u636e\u5206\u6790\uff08EDA\uff09\uff0c\u5e76\u5728\u5fc5\u8981\u65f6\u8003\u8651\u4f7f\u7528\u5176\u4ed6\u65b9\u6cd5\uff08\u5982\u591a\u5143\u56de\u5f52\u3001\u975e\u7ebf\u6027\u56de\u5f52\u7b49\uff09\u6765\u5206\u6790\u6570\u636e\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\n
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\u9664\u4e86\u5bf9\u6a21\u578b\u8fdb\u884c\u9002\u5f53\u7684\u68c0\u9a8c\u4e4b\u5916\uff0c\u8fd8\u53ef\u4ee5\u5c1d\u8bd5\u4f7f\u7528\u8bf8\u5982\u4ea4\u53c9\u9a8c\u8bc1\u4e4b\u7c7b\u7684\u65b9\u6cd5\u6765\u8bc4\u4f30\u6a21\u578b\u7684\u9884\u6d4b\u6027\u80fd\u3002\u8fd9\u6709\u52a9\u4e8e\u786e\u4fdd\u6a21\u578b\u5728\u65b0\u6570\u636e\u4e0a\u7684\u8868\u73b0\u826f\u597d\uff0c\u907f\u514d\u8fc7\u62df\u5408\u95ee\u9898\u3002<\/p>\n

\u4ee5\u4e0b\u662f\u8fdb\u4e00\u6b65\u4f18\u5316\u7ebf\u6027\u56de\u5f52\u6a21\u578b\u7684\u4e00\u4e9b\u5efa\u8bae\uff1a<\/p>\n

\u6a21\u578b\u8bca\u65ad\uff1a<\/h4>\n

\u4f7f\u7528\u56fe\u5f62\u548c\u7edf\u8ba1\u65b9\u6cd5\u68c0\u67e5\u7ebf\u6027\u56de\u5f52\u6a21\u578b\u7684\u5047\u8bbe\uff0c\u4f8b\u5982\u6b8b\u5dee\u56fe\u3001QQ\u56fe\u7b49\u3002\u8fd9\u6709\u52a9\u4e8e\u8bc6\u522b\u6f5c\u5728\u7684\u95ee\u9898\uff0c\u4f8b\u5982\u975e\u7ebf\u6027\u5173\u7cfb\u3001\u5f02\u65b9\u5dee\u6216\u5f02\u5e38\u503c\u3002<\/p>\n

\n
<\/div>\n
# \u6b8b\u5dee\u56fe<\/span>
\nplot(<\/span>model$<\/span>residuals,<\/span> main =<\/span> \"Residual Plot\"<\/span>)<\/span><\/p>\n

# QQ\u56fe<\/span>
\nqqnorm(<\/span>model$<\/span>residuals,<\/span> main =<\/span> \"QQ Plot\"<\/span>)<\/span>
\nqqline(<\/span>model$<\/span>residuals)<\/span>
\n<\/code><\/div>\n<\/div>\n

\u4f18\u5316\u6a21\u578b\uff1a<\/h4>\n

\u5982\u679c\u53d1\u73b0\u6a21\u578b\u5047\u8bbe\u4e0d\u6ee1\u8db3\u6216\u5b58\u5728\u5176\u4ed6\u95ee\u9898\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u5bf9\u6570\u636e\u8fdb\u884c\u53d8\u6362\uff08\u5982\u5bf9\u6570\u53d8\u6362\u3001Box-Cox\u53d8\u6362\u7b49\uff09\u3001\u79fb\u9664\u5f02\u5e38\u503c\u6216\u4f7f\u7528\u5176\u4ed6\u7c7b\u578b\u7684\u56de\u5f52\u6a21\u578b\uff08\u5982\u591a\u9879\u5f0f\u56de\u5f52\u3001\u5e7f\u4e49\u7ebf\u6027\u6a21\u578b\u7b49\uff09\u3002<\/p>\n

\u4ea4\u53c9\u9a8c\u8bc1\uff1a<\/h4>\n

\u4f7f\u7528\u4ea4\u53c9\u9a8c\u8bc1\uff08\u5982K\u6298\u4ea4\u53c9\u9a8c\u8bc1\uff09\u8bc4\u4f30\u6a21\u578b\u7684\u9884\u6d4b\u6027\u80fd\u3002\u8fd9\u6709\u52a9\u4e8e\u9632\u6b62\u8fc7\u62df\u5408\uff0c\u63d0\u9ad8\u6a21\u578b\u5728\u65b0\u6570\u636e\u4e0a\u7684\u6cdb\u5316\u80fd\u529b\u3002<\/p>\n

\n
<\/div>\n
# \u5b89\u88c5\u548c\u52a0\u8f7d\u5305<\/span>
\ninstall.packages(<\/span>\"caret\"<\/span>)<\/span>
\nlibrary(<\/span>caret)<\/span><\/p>\n

# \u8bbe\u7f6e\u4ea4\u53c9\u9a8c\u8bc1\u53c2\u6570<\/span>
\ncontrol <-<\/span> trainControl(<\/span>method =<\/span> \"cv\"<\/span>,<\/span> number =<\/span> 10<\/span>)<\/span><\/p>\n

# \u4f7f\u7528\u4ea4\u53c9\u9a8c\u8bc1\u8bc4\u4f30\u7ebf\u6027\u56de\u5f52\u6a21\u578b<\/span>
\nset.seed(<\/span>123<\/span>)<\/span> # \u4fdd\u8bc1\u7ed3\u679c\u53ef\u91cd\u590d<\/span>
\ncv_model <-<\/span> train(<\/span>sales ~<\/span> ad_spend,<\/span> data =<\/span> data,<\/span> method =<\/span> \"lm\"<\/span>,<\/span> trControl =<\/span> control)<\/span><\/p>\n

# \u67e5\u770b\u4ea4\u53c9\u9a8c\u8bc1\u7ed3\u679c<\/span>
\nprint(<\/span>cv_model)<\/span>
\n<\/code><\/div>\n<\/div>\n

\u6a21\u578b\u9009\u62e9\uff1a<\/h4>\n

\u5982\u679c\u6709\u591a\u4e2a\u6a21\u578b\u4f9b\u9009\u62e9\uff0c\u53ef\u4ee5\u6bd4\u8f83\u4e0d\u540c\u6a21\u578b\u7684\u9884\u6d4b\u6027\u80fd\uff0c\u9009\u62e9\u6700\u9002\u5408\u7684\u6a21\u578b\u3002\u5e38\u7528\u7684\u8bc4\u4f30\u6307\u6807\u5305\u62ec\u5747\u65b9\u8bef\u5dee\uff08MSE\uff09\u3001\u6839\u5747\u65b9\u8bef\u5dee\uff08RMSE\uff09\u548cR\u5e73\u65b9\u503c\u7b49\u3002<\/p>\n

\u901a\u8fc7\u4e0a\u8ff0\u65b9\u6cd5\uff0c\u4f60\u53ef\u4ee5\u66f4\u6df1\u5165\u5730\u4e86\u89e3\u7ebf\u6027\u56de\u5f52\u6a21\u578b\uff0c\u5e76\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u4f18\u5316\u6a21\u578b\u4ee5\u83b7\u5f97\u66f4\u597d\u7684\u9884\u6d4b\u7ed3\u679c\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8bf7\u786e\u4fdd\u5145\u5206\u7406\u89e3\u6570\u636e\u7279\u70b9\u548c\u95ee\u9898\u80cc\u666f\uff0c\u4ee5\u4fbf\u9009\u62e9\u5408\u9002\u7684\u5206\u6790\u65b9\u6cd5\u3002<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\u7ebf\u6027\u56de\u5f52\u662f\u4e00\u79cd\u7edf\u8ba1\u65b9\u6cd5\uff0c\u7528\u4e8e\u7814\u7a76\u81ea\u53d8\u91cf\uff08X\uff09\u4e0e\u56e0\u53d8\u91cf\uff08Y\uff09\u4e4b\u95f4\u7684\u7ebf\u6027\u5173\u7cfb\u3002R\u8bed\u8a00\u4e2d\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u8fdb\u884c\u7ebf\u6027\u56de\u5f52\u5206 […]<\/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-424","post","type-post","status-publish","format-standard","hentry","category-r"],"_links":{"self":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/424","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=424"}],"version-history":[{"count":0,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=\/wp\/v2\/posts\/424\/revisions"}],"wp:attachment":[{"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunshangtulv.com.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}