{"id":2055,"date":"2023-07-23T22:07:02","date_gmt":"2023-07-23T22:07:02","guid":{"rendered":"https:\/\/statorials.org\/it\/r-leggi-csv-da-lurl\/"},"modified":"2023-07-23T22:07:02","modified_gmt":"2023-07-23T22:07:02","slug":"r-leggi-csv-da-lurl","status":"publish","type":"post","link":"https:\/\/statorials.org\/it\/r-leggi-csv-da-lurl\/","title":{"rendered":"Come leggere un csv da un url in r (3 metodi)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Esistono tre metodi che puoi utilizzare per leggere un file CSV da un URL in R:<\/span><\/p>\n<p> <strong><span style=\"color: #000000;\">Metodo 1: utilizzare Base R<\/span><\/strong><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>data &lt;- read. <span style=\"color: #3366ff;\">csv<\/span> ('https:\/\/website.com\/data.csv')\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metodo 2: utilizzare il pacchetto data.table<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #ff0000;\">library<\/span> (data.table)\n\ndata &lt;- fread('https:\/\/website.com\/data.csv')<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>Metodo 3: utilizzare il pacchetto readr<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #ff0000;\">library<\/span> (readr)\n\ndata &lt;- read_csv('https:\/\/website.com\/data.csv')<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Ciascun metodo funziona allo stesso modo, ma i metodi <strong>data.table<\/strong> e <strong>readr<\/strong> tendono ad essere molto pi\u00f9 veloci se stai leggendo un set di dati di grandi dimensioni.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Gli esempi seguenti mostrano come utilizzare ciascun metodo nella pratica.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Metodo 1: utilizzare Base R<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come importare un file CSV da un URL utilizzando Base R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#import data from URL<\/span>\ndata &lt;- read. <span style=\"color: #3366ff;\">csv<\/span> ('https:\/\/raw.githubusercontent.com\/Statorials\/Miscellaneous\/main\/basketball_data.csv')\n\n<span style=\"color: #008080;\">#view first five rows<\/span>\nhead(data)\n\n  player assists points\n1 to 6 12\n2 B 7 19\n3 C 14 7\n4 D 4 6\n5 E 5 10\n\n<span style=\"color: #008080;\">#view class of data\n<\/span>class(data)\n\n[1] \"data.frame\"\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Metodo 2: utilizzare data.table<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come importare un file CSV da un URL utilizzando il pacchetto <a href=\"https:\/\/cran.r-project.org\/web\/packages\/data.table\/vignettes\/datatable-intro.html\" target=\"_blank\" rel=\"noopener\">data.table<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #ff0000;\">library<\/span> (data.table)<\/span>\n\n#import data from URL<\/span>\ndata2 &lt;- fread('https:\/\/raw.githubusercontent.com\/Statorials\/Miscellaneous\/main\/basketball_data.csv')\n\n<span style=\"color: #008080;\">#view first five rows<\/span>\nhead(data2)\n\n   player assists points\n1: A 6 12\n2: B 7 19\n3: C 14 7\n4: D 4 6\n5: E 5 10\n\n<span style=\"color: #008080;\">#view class of data\n<\/span>class(data2)\n\n[1] \"data.table\" \"data.frame\"\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Metodo 3: utilizzare readr<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come importare un file CSV da un URL utilizzando il pacchetto <a href=\"https:\/\/readr.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">readr<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #ff0000;\">library<\/span> (readr)<\/span>\n\n#import data from URL<\/span>\ndata3 &lt;- fread('https:\/\/raw.githubusercontent.com\/Statorials\/Miscellaneous\/main\/basketball_data.csv')\n\n<span style=\"color: #008080;\">#view first five rows<\/span>\nhead(data3)\n\n  player assists points\n        \n1 to 6 12\n2 B 7 19\n3 C 14 7\n4 D 4 6\n5 E 5 10\n\n<span style=\"color: #008080;\">#view class of data\n<\/span>class(data3)\n\n[1] \"spec_tbl_df\" \"tbl_df\" \"tbl\" \"data.frame\" \n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Risorse addizionali<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">I seguenti tutorial spiegano come importare altri tipi di file in R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/it\/importare-csv-in-r\/\" target=\"_blank\" rel=\"noopener\">Come importare file CSV in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/importare-excel-in-r\/\" target=\"_blank\" rel=\"noopener\">Come importare file Excel in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/importa-il-file-spss-in-r\/\" target=\"_blank\" rel=\"noopener\">Come importare file SPSS in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/import-sas-in-r\/\" target=\"_blank\" rel=\"noopener\">Come importare file SAS in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/importare-il-file-di-dati-in-r\/\" target=\"_blank\" rel=\"noopener\">Come importare file di dati in R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Esistono tre metodi che puoi utilizzare per leggere un file CSV da un URL in R: Metodo 1: utilizzare Base R data &lt;- read. csv (&#8216;https:\/\/website.com\/data.csv&#8217;) Metodo 2: utilizzare il pacchetto data.table library (data.table) data &lt;- fread(&#8216;https:\/\/website.com\/data.csv&#8217;) Metodo 3: utilizzare il pacchetto readr library (readr) data &lt;- read_csv(&#8216;https:\/\/website.com\/data.csv&#8217;) Ciascun metodo funziona allo stesso modo, ma [&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":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Come leggere un CSV da un URL in R (3 metodi) - Statorials<\/title>\n<meta name=\"description\" content=\"Questo tutorial spiega come leggere un file CSV da un URL in R, inclusi tre metodi diversi.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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