{"id":2040,"date":"2023-07-23T23:32:33","date_gmt":"2023-07-23T23:32:33","guid":{"rendered":"https:\/\/statorials.org\/pt\/randomforest-na-nan-inf-na-chamada-de-funcao-estrangeira\/"},"modified":"2023-07-23T23:32:33","modified_gmt":"2023-07-23T23:32:33","slug":"randomforest-na-nan-inf-na-chamada-de-funcao-estrangeira","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/randomforest-na-nan-inf-na-chamada-de-funcao-estrangeira\/","title":{"rendered":"Como corrigir: randomforest.default(m, y, \u2026): na\/nan\/inf na chamada de fun\u00e7\u00e3o estrangeira"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Um erro que voc\u00ea pode encontrar no R \u00e9:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>Error in randomForest.default(m, y, ...): \n  NA\/NaN\/Inf in foreign function call (arg 1)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Este erro pode ocorrer por dois motivos:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Existem valores NA, NaN ou Inf no conjunto de dados<\/span><\/li>\n<li> <span style=\"color: #000000;\">Uma das vari\u00e1veis no conjunto de dados \u00e9 um caractere<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">A maneira mais f\u00e1cil de corrigir esse erro \u00e9 remover linhas com dados ausentes e converter vari\u00e1veis de caracteres em vari\u00e1veis de fator:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#remove rows with missing values \n<\/span>df &lt;- na. <span style=\"color: #3366ff;\">omitted<\/span> (df)\n\n<span style=\"color: #008080;\">#convert all character variables to factor variables<\/span>\n<span style=\"color: #993300;\">library<\/span> (dplyr)\ndf %&gt;% mutate_if(is. <span style=\"color: #3366ff;\">character<\/span> , as. <span style=\"color: #3366ff;\">factor<\/span> )<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Este tutorial compartilha um exemplo de como corrigir esse erro na pr\u00e1tica.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Relacionado:<\/strong><\/span> <a href=\"https:\/\/statorials.org\/pt\/broca-aleatoria-em-r\/\" target=\"_blank\" rel=\"noopener\">Como criar florestas aleat\u00f3rias em R (passo a passo)<\/a><\/p>\n<h3> <strong>Como reproduzir o erro<\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Suponha que estejamos tentando ajustar uma floresta aleat\u00f3ria ao seguinte quadro de dados em R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #993300;\">library<\/span> (randomForest)\n\n<span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (y &lt;- c(30, 29, 30, 45, 23, 19, 9, 8, 11, 14),\n                 x1 &lt;- c('A', 'A', 'B', 'B', 'B', 'B', 'C', 'C', 'C', 'C'),\n                 x2 &lt;- c(4, 4, 5, 7, 8, 7, 9, 6, 13, 15))\n\n<span style=\"color: #008080;\">#attempt to fit random forest model\n<\/span>model &lt;- randomForest(formula = y ~ ., data = df)\n\nError in randomForest.default(m, y, ...):\n  NA\/NaN\/Inf in foreign function call (arg 1)<\/span><\/span><\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Recebemos um erro porque x1 \u00e9 uma vari\u00e1vel de caractere no quadro de dados.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Podemos confirmar isso usando a fun\u00e7\u00e3o <strong>str()<\/strong> para exibir a estrutura do quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #000000;\"><span style=\"color: #993300;\"><span style=\"color: #000000;\">str(df)<\/span>\n\n<\/span>'data.frame': 10 obs. of 3 variables:\n $ y....c.30..29..30..45: num 30 29 30 45 23 19 9 8 11 14\n $ x1....c..A....A....B....B.... : chr \"A\" \"A\" \"B\" \"B\"\n $ x2....c.4..4..5..7..: num 4 4 5 7 8 7 9 6 13 15<\/span><\/strong><\/span>\n<\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Como corrigir o erro<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Para corrigir esse erro, podemos usar a fun\u00e7\u00e3o <strong>mutate_if()<\/strong> de <a href=\"https:\/\/dplyr.tidyverse.org\/reference\/mutate_all.html\" target=\"_blank\" rel=\"noopener\">dplyr<\/a> para converter cada coluna de caracteres em uma coluna de fator:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #993300;\">library<\/span> (dplyr)\n\n<span style=\"color: #008080;\">#convert each character column to factor\n<\/span>df = df %&gt;% mutate_if(is. <span style=\"color: #3366ff;\">character<\/span> , as. <span style=\"color: #3366ff;\">factor<\/span> )\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Podemos ent\u00e3o ajustar o modelo de floresta aleat\u00f3rio ao quadro de dados:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#fit random forest model<\/span>\nmodel &lt;- randomForest(formula = y ~ ., data = df)\n\n<span style=\"color: #008080;\">#view summary of model<\/span>\nmodel\n\nCall:\n randomForest(formula = y ~ ., data = df) \n               Type of random forest: regression\n                     Number of trees: 500\nNo. of variables tried at each split: 1\n\n          Mean of squared residuals: 65.0047\n                    % Var explained: 48.64\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">N\u00e3o recebemos nenhum erro desta vez porque n\u00e3o h\u00e1 mais vari\u00e1veis de caracteres no dataframe.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Recursos adicionais<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Os tutoriais a seguir explicam como resolver outros erros comuns em R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pt\/a-condicao-r-tem-comprimento-1-apenas-o-primeiro-elemento-sera-usado\/\" target=\"_blank\" rel=\"noopener\">Como corrigir: a condi\u00e7\u00e3o tem comprimento &gt; 1 e apenas o primeiro elemento ser\u00e1 usado<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/r-erro-dim-deve-ter-comprimento-positivo\/\" target=\"_blank\" rel=\"noopener\">Como corrigir em R: dim(X) deve ter comprimento positivo<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/r-valor-ausente-ou-verdadeiro-falso-necessario\/\" target=\"_blank\" rel=\"noopener\">Como corrigir em R: valor ausente onde verdadeiro\/falso \u00e9 necess\u00e1rio<\/a><br \/> <a href=\"https:\/\/statorials.org\/pt\/nas-introduzido-por-coercao-em-r\/\" target=\"_blank\" rel=\"noopener\">Como corrigir: NAs introduzidos por coer\u00e7\u00e3o<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Um erro que voc\u00ea pode encontrar no R \u00e9: Error in randomForest.default(m, y, &#8230;): NA\/NaN\/Inf in foreign function call (arg 1) Este erro pode ocorrer por dois motivos: Existem valores NA, NaN ou Inf no conjunto de dados Uma das vari\u00e1veis no conjunto de dados \u00e9 um caractere A maneira mais f\u00e1cil de corrigir esse [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-2040","post","type-post","status-publish","format-standard","hentry","category-guia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Como corrigir: randomForest.default(m, y, ...): Na\/NaN\/Inf na chamada de fun\u00e7\u00e3o estrangeira - Estatoriais<\/title>\n<meta name=\"description\" content=\"Este tutorial explica como corrigir o seguinte erro em R: erro em randomforest.default(m, y, 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