{"id":207,"date":"2023-05-23T16:53:58","date_gmt":"2023-08-19T18:16:48","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/r%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%9f%e3%83%b3%e3%82%b0%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bpredict%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/"},"modified":"2025-07-31T21:39:53","modified_gmt":"2025-07-31T12:39:53","slug":"r%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%9f%e3%83%b3%e3%82%b0%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bpredict%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/r%e3%83%97%e3%83%ad%e3%82%b0%e3%83%a9%e3%83%9f%e3%83%b3%e3%82%b0%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bpredict%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/","title":{"rendered":"R\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306b\u304a\u3051\u308bpredict()\u95a2\u6570\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"<h3>\u5c0e\u5165\u90e8\u3092\u65e5\u672c\u8a9e\u3067\u8868\u73fe\u3059\u308b\u3068\u3001\u300c\u306f\u3058\u3081\u306b\u300d\u3068\u306a\u308a\u307e\u3059\u3002<\/h3>\n<p>R\u306epredict()\u95a2\u6570\u306f\u3001\u5165\u529b\u30c7\u30fc\u30bf\u306b\u57fa\u3065\u3044\u3066\u5024\u3092\u4e88\u6e2c\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002R\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u3059\u3079\u3066\u306e\u5074\u9762\u306f\u3001\u5404\u3005\u306e\u65b9\u6cd5\u3067predict()\u95a2\u6570\u3092\u5229\u7528\u3057\u307e\u3059\u304c\u3001\u30b1\u30fc\u30b9\u306b\u95a2\u4fc2\u306a\u304fpredict()\u95a2\u6570\u306e\u6a5f\u80fd\u306f\u540c\u3058\u3067\u3059\u3002<\/p>\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001R\u306epredict()\u95a2\u6570\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u63a2\u3063\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\u524d\u63d0\u6761\u4ef6<\/h2>\n<p>\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092\u5b8c\u4e86\u3059\u308b\u305f\u3081\u306b\u306f\u3001\u4ee5\u4e0b\u304c\u5fc5\u8981\u3067\u3059\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>To have installed R.<\/li>\n<\/ul>\n<h2>R\u306epredict()\u95a2\u6570\u306e\u69cb\u6587<\/h2>\n<p>R\u306epredict()\u95a2\u6570\u306f\u3001\u5165\u529b\u30c7\u30fc\u30bf\u306b\u57fa\u3065\u3044\u3066\u5024\u3092\u4e88\u6e2c\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>predict<span class=\"token punctuation\">(<\/span>object<span class=\"token punctuation\">,<\/span> newdata<span class=\"token punctuation\">,<\/span> interval<span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\n<li>object: The class inheriting from the linear model<\/li>\n<li>newdata: Input data to predict the values<\/li>\n<li>interval: Type of interval calculation<\/li>\n<\/ul>\n<h2>predict()\u95a2\u6570\u306e\u4f8b<\/h2>\n<p>\u4e88\u6e2c\u306e\u305f\u3081\u306b\u30c7\u30fc\u30bf\u304c\u5fc5\u8981\u3067\u3059\u3002\u3053\u306e\u4f8b\u3067\u306f\u3001R\u306e\u7d44\u307f\u8fbc\u307f\u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u3067\u3042\u308b\u300cCars\u300d\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>df <span class=\"token operator\">&lt;-<\/span> datasets<span class=\"token operator\">::<\/span>cars\r\n<\/code><\/pre>\n<p>\u3053\u308c\u306b\u3088\u308a\u3001\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306b\u901f\u5ea6\u3068\u8ddd\u96e2\u306e\u5024\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u5272\u308a\u5f53\u3066\u3089\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>     speed dist\r\n1      4    2\r\n2      4   10\r\n3      7    4\r\n4      7   22\r\n5      8   16\r\n6      9   10\r\n7     10   18\r\n8     10   26\r\n9     10   34\r\n10    11   17\r\n<\/code><\/pre>\n<p>\u6b21\u306b\u3001\u3053\u306e\u30c7\u30fc\u30bf\u3092\u4f7f\u7528\u3057\u3066predict()\u3092\u4f7f\u3063\u3066\u5c06\u6765\u306e\u5024\u3092\u6c42\u3081\u307e\u3059\u3002<\/p>\n<p>\u6700\u521d\u306b\u3001\u3053\u306e\u30c7\u30fc\u30bf\u30d5\u30ec\u30fc\u30e0\u306e\u305f\u3081\u306b\u7dda\u5f62\u30e2\u30c7\u30eb\u3092\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token comment\"># Creates a linear model<\/span>\r\nmy_linear_model <span class=\"token operator\">&lt;-<\/span> lm<span class=\"token punctuation\">(<\/span>dist<span class=\"token operator\">~<\/span>speed<span class=\"token punctuation\">,<\/span> data <span class=\"token operator\">=<\/span> df<span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token comment\"># Prints the model results<\/span>\r\nmy_linear_model\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u7dda\u5f62\u30e2\u30c7\u30eb\u306e\u7d50\u679c\u304c\u8a08\u7b97\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>Call:\r\nlm(formula = dist ~ speed, data = df)\r\n\r\nCoefficients:\r\n(Intercept)        speed\r\n    -17.579        3.932\r\n<\/code><\/pre>\n<p>\u7dda\u5f62\u30e2\u30c7\u30eb\u306f\u3001\u8eca\u306e\u901f\u5ea6\u3092\u79c1\u305f\u3061\u306e\u5165\u529b\u30c7\u30fc\u30bf\u306e\u632f\u308b\u821e\u3044\u306b\u57fa\u3065\u3044\u3066\u8fd4\u3057\u307e\u3057\u305f\u3002\u30e2\u30c7\u30eb\u3092\u6301\u3063\u3066\u3044\u308b\u306e\u3067\u3001predict() \u3092\u9069\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token comment\"># Creating a data frame<\/span>\r\nvariable_speed <span class=\"token operator\">&lt;-<\/span> data.frame<span class=\"token punctuation\">(<\/span>speed <span class=\"token operator\">=<\/span> c<span class=\"token punctuation\">(<\/span><span class=\"token number\">11<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">11<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token comment\"># Fiting the linear model<\/span>\r\nlinear_model <span class=\"token operator\">&lt;-<\/span> lm<span class=\"token punctuation\">(<\/span>dist<span class=\"token operator\">~<\/span>speed<span class=\"token punctuation\">,<\/span> data <span class=\"token operator\">=<\/span> df<span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token comment\"># Predicts the future values<\/span>\r\n<mark>predict<span class=\"token punctuation\">(<\/span><\/mark>linear_model<span class=\"token punctuation\">,<\/span> newdata <span class=\"token operator\">=<\/span> variable_speed<mark><span class=\"token punctuation\">)<\/span><\/mark>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306f\u6b21\u306e\u51fa\u529b\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>       1        2        3        4        5\r\n25.67740 25.67740 29.60981 29.60981 29.60981\r\n       6        7        8        9       10\r\n29.60981 33.54222 33.54222 33.54222 33.54222\r\n<\/code><\/pre>\n<p>\u3046\u307e\u304f\u3044\u3051\u3070\u3001\u524d\u306e\u30c7\u30fc\u30bf\u3068\u7dda\u5f62\u30e2\u30c7\u30eb\u306e\u52a9\u3051\u3092\u501f\u308a\u3066\u3001\u5c06\u6765\u306e\u8ddd\u96e2\u306e\u5024\u3092\u4e88\u6e2c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u4eca\u3001\u79c1\u305f\u3061\u306f\u4e88\u6e2c\u5024\u306e\u300c\u4fe1\u983c\u5ea6\u300d\u30ec\u30d9\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u3001\u4e88\u6e2c\u306e\u6b63\u78ba\u6027\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h2>\u4e88\u6e2c\u3055\u308c\u305f\u5024\u306b\u5bfe\u3059\u308b\u4fe1\u983c\u6027<\/h2>\n<p>\u4e88\u6e2c\u95a2\u6570\u5185\u306e\u4fe1\u983c\u533a\u9593\u306f\u3001\u4e88\u6e2c\u306e\u4e0d\u78ba\u5b9f\u6027\u3092\u8a55\u4fa1\u3059\u308b\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token comment\"># Input data<\/span>\r\nvariable_speed <span class=\"token operator\">&lt;-<\/span> data.frame<span class=\"token punctuation\">(<\/span>speed <span class=\"token operator\">=<\/span> c<span class=\"token punctuation\">(<\/span><span class=\"token number\">11<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">11<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">12<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">,<\/span><span class=\"token number\">13<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token comment\"># Fits the model<\/span>\r\nlinear_model <span class=\"token operator\">&lt;-<\/span> lm<span class=\"token punctuation\">(<\/span>dist<span class=\"token operator\">~<\/span>speed<span class=\"token punctuation\">,<\/span> data <span class=\"token operator\">=<\/span> df<span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token comment\"># Predicts the values with confidence interval<\/span>\r\npredict<span class=\"token punctuation\">(<\/span>linear_model<span class=\"token punctuation\">,<\/span> newdata <span class=\"token operator\">=<\/span> variable_speed<span class=\"token punctuation\">,<\/span> <mark>interval <span class=\"token operator\">=<\/span> <span class=\"token string\">'confidence'<\/span><\/mark><span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u306f\u6b21\u306e\u51fa\u529b\u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>      fit      lwr      upr\r\n1  25.67740 19.96453 31.39028\r\n2  25.67740 19.96453 31.39028\r\n3  29.60981 24.39514 34.82448\r\n4  29.60981 24.39514 34.82448\r\n5  29.60981 24.39514 34.82448\r\n6  29.60981 24.39514 34.82448\r\n7  33.54222 28.73134 38.35310\r\n8  33.54222 28.73134 38.35310\r\n9  33.54222 28.73134 38.35310\r\n10 33.54222 28.73134 38.35310\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u51fa\u529b\u306b\u306f\u3001\u4e88\u6e2c\u5024\u306e\u4fe1\u983c\u533a\u9593\u3092\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 (J\u014dki no shutsuryoku ni wa, yosoku-chi no shinrai kukan o kakunin suru koto ga dekimasu.)<\/p>\n<p>\u3053\u306e\u51fa\u529b\u304b\u3089\u3001\u6642\u901f11\u301c13\u30de\u30a4\u30eb\u3067\u8d70\u884c\u3057\u3066\u3044\u308b\u8eca\u306f\u300119.9\u304b\u308931.3\u30de\u30a4\u30eb\u306e\u7bc4\u56f2\u3067\u8d70\u884c\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u304c\u4e88\u6e2c\u3055\u308c\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u904e\u53bb\u306e\u30c7\u30fc\u30bf\u306e\u632f\u308b\u821e\u3044\u306b\u57fa\u3065\u3044\u3066\u5024\u3092\u4e88\u6e2c\u3059\u308b\u305f\u3081\u306b\u3001\u4e88\u6e2c() \u95a2\u6570\u306f\u30c7\u30fc\u30bf\u3092\u30e2\u30c7\u30eb\u306b\u9069\u5408\u3055\u305b\u308b\u3053\u3068\u3067\u7528\u3044\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u4e88\u6e2c\u306e\u6b63\u78ba\u6027\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001\u4fe1\u983c\u533a\u9593\u3082\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u53c2\u8003\u6587\u732e<\/p>\n<ul class=\"post-ul\">\n<li>R documentation<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u5c0e\u5165\u90e8\u3092\u65e5\u672c\u8a9e\u3067\u8868\u73fe\u3059\u308b\u3068\u3001\u300c\u306f\u3058\u3081\u306b\u300d\u3068\u306a\u308a\u307e\u3059\u3002 R\u306epredict()\u95a2\u6570\u306f\u3001\u5165\u529b\u30c7\u30fc\u30bf\u306b\u57fa\u3065\u3044\u3066\u5024\u3092\u4e88\u6e2c\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002R\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30e2\u30c7\u30ea\u30f3\u30b0\u306e\u3059\u3079\u3066\u306e\u5074\u9762\u306f\u3001\u5404\u3005\u306e\u65b9\u6cd5\u3067predict()\u95a2\u6570\u3092\u5229\u7528\u3057 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