{"id":2962,"date":"2023-07-19T21:36:32","date_gmt":"2023-07-19T21:36:32","guid":{"rendered":"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/"},"modified":"2023-07-19T21:36:32","modified_gmt":"2023-07-19T21:36:32","slug":"r-istogramma-di-colori-diversi","status":"publish","type":"post","link":"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/","title":{"rendered":"Come creare un istogramma con colori diversi in r"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Spesso potresti voler creare un istogramma con diversi colori in R.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Gli esempi seguenti mostrano come eseguire questa operazione in base R e <a href=\"https:\/\/ggplot2.tidyverse.org\/\" target=\"_blank\" rel=\"noopener\">ggplot2<\/a> .<\/span><\/p>\n<h3> <strong><span style=\"color: #000000;\">Esempio 1: istogramma con colori diversi in base R<\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come creare un istogramma con un singolo colore in base R:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (x=c(12, 14, 14, 15, 15, 17, 19, 22, 23, 23, 24))\n\n<span style=\"color: #008080;\">#create histogram\n<\/span>hist(df$x)\n<\/strong><\/span><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25673 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/couleur-differente1.jpg\" alt=\"\" width=\"428\" height=\"435\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Per impostazione predefinita, tutti i colori delle barre sono uguali nell&#8217;istogramma.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Tuttavia, possiamo utilizzare il seguente codice per creare un istogramma con tre colori diversi:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (x=c(12, 14, 14, 15, 15, 17, 19, 22, 23, 23, 24))\n\n<span style=\"color: #008080;\">#define histogram break points\n<\/span>hist_breaks &lt;- hist(df$x)$breaks\n\n<span style=\"color: #008080;\">#define colors to use in histogram based on break points\n<\/span>color_list &lt;- rep(' <span style=\"color: #ff0000;\">red<\/span> ', length(hist_breaks))\ncolor_list[hist_breaks &lt; <span style=\"color: #008000;\">20<\/span> ] &lt;- ' <span style=\"color: #ff0000;\">blue<\/span> '\ncolor_list[hist_breaks &lt; <span style=\"color: #008000;\">16<\/span> ] &lt;- ' <span style=\"color: #ff0000;\">purple<\/span> '\n\n<span style=\"color: #008080;\">#create histogram with custom colors<\/span>\nhist(df$x, col=color_list)\n<\/strong><\/span><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-25674 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/couleur-differente2.jpg\" alt=\"istogramma con colori diversi in R\" width=\"447\" height=\"441\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Ecco come ha funzionato la logica per creare i tre colori:<\/span><\/p>\n<ul>\n<li> <span style=\"color: #000000;\">Per prima cosa abbiamo specificato che ogni barra fosse <strong>rossa<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">Poi abbiamo cambiato ogni barra con un punto di interruzione inferiore a 20 in <strong>blu<\/strong> .<\/span><\/li>\n<li> <span style=\"color: #000000;\">Poi abbiamo cambiato ogni barra con un punto di interruzione inferiore a 16 in <strong>viola<\/strong> .<\/span><\/li>\n<\/ul>\n<p> <span style=\"color: #000000;\">Il risultato finale \u00e8 un istogramma a tre colori.<\/span><\/p>\n<h3> <strong><span style=\"color: #000000;\">Esempio 2: istogramma con colori diversi in ggplot2<\/span><\/strong><\/h3>\n<p> <span style=\"color: #000000;\">Supponiamo di avere il seguente frame di dati in R:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create data frame\n<\/span>df &lt;- data. <span style=\"color: #3366ff;\">frame<\/span> (x=c(12, 14, 14, 15, 15, 17, 19, 22, 23, 23, 24))\n\n<span style=\"color: #008080;\">#view data frame<\/span>\ndf\n\n    x\n1 12\n2 14\n3 14\n4 15\n5 15\n6 17\n7 19\n8 22\n9 23\n10 23\n11 24\n<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Per creare un istogramma con colori diversi per questo frame di dati, dobbiamo prima creare una variabile di raggruppamento per i valori utilizzando <a href=\"https:\/\/statorials.org\/it\/altrimenti-in-r-annidato\/\" target=\"_blank\" rel=\"noopener\">un&#8217;istruzione if else nidificata<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create grouping variable\n<span style=\"color: #000000;\">df$group = ifelse(df$x &lt; <span style=\"color: #008000;\">16<\/span> , ' <span style=\"color: #ff0000;\">C<\/span> ', ifelse(df$x &lt; <span style=\"color: #008000;\">20<\/span> , ' <span style=\"color: #ff0000;\">B<\/span> ', ' <span style=\"color: #ff0000;\">A<\/span> '))<\/span>\n<\/span>\n<span style=\"color: #008080;\">#view updated data frame<\/span>\ndf\n\n    x group\n1 12 C\n2 14C\n3 14C\n4 15C\n5 15C\n6 17 B\n7 19 B\n8 22 A\n9 23 A\n10 23 A\n11 24 A<\/strong><\/span><\/pre>\n<p> <span style=\"color: #000000;\">Ora possiamo creare un istogramma in ggplot2 e impostare i colori nel grafico utilizzando la variabile group:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong><span style=\"color: #008080;\">#create histogram with custom colors\n<\/span>ggplot(df, aes(x, fill=group)) +\n  geom_histogram(bins= <span style=\"color: #008000;\">6<\/span> , color=' <span style=\"color: #ff0000;\">black<\/span> ') +\n   scale_fill_manual(values = c(' <span style=\"color: #ff0000;\">A<\/span> ' = ' <span style=\"color: #ff0000;\">red<\/span> ',\n                                ' <span style=\"color: #ff0000;\">B<\/span> ' = ' <span style=\"color: #ff0000;\">blue<\/span> ',\n                                ' <span style=\"color: #ff0000;\">C<\/span> ' = ' <span style=\"color: #ff0000;\">purple<\/span> '))\n<\/strong><\/span><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-25675 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/couleur-differente3.jpg\" alt=\"\" width=\"474\" height=\"478\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Il risultato finale \u00e8 un istogramma a tre colori.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Nota<\/strong> : puoi trovare la documentazione completa per <b>scale_fill_manual()<\/b> <a href=\"https:\/\/ggplot2.tidyverse.org\/reference\/scale_manual.html\" target=\"_blank\" rel=\"noopener\">qui<\/a> .<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Risorse addizionali<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">I seguenti tutorial spiegano come eseguire altre operazioni comuni in R:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/it\/istogramma-della-frequenza-relativa-r\/\" target=\"_blank\" rel=\"noopener\">Come creare un istogramma di frequenza relativo in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/sovrapporre-la-curva-normale-dellistogramma-in-r\/\" target=\"_blank\" rel=\"noopener\">Come sovrapporre una curva normale su un istogramma in R<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/r-listogramma-salta\/\" target=\"_blank\" rel=\"noopener\">Come specificare le interruzioni dell&#8217;istogramma in R<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spesso potresti voler creare un istogramma con diversi colori in R. Gli esempi seguenti mostrano come eseguire questa operazione in base R e ggplot2 . Esempio 1: istogramma con colori diversi in base R Il codice seguente mostra come creare un istogramma con un singolo colore in base R: #create data frame df &lt;- data. [&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 creare un istogramma con colori diversi in R - Stology<\/title>\n<meta name=\"description\" content=\"Questo tutorial spiega come creare un istogramma con colori diversi in R, incluso un esempio in R base e ggplot2.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Come creare un istogramma con colori diversi in R - Stology\" \/>\n<meta property=\"og:description\" content=\"Questo tutorial spiega come creare un istogramma con colori diversi in R, incluso un esempio in R base e ggplot2.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-19T21:36:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/couleur-differente1.jpg\" \/>\n<meta name=\"author\" content=\"Benjamin anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/\",\"url\":\"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/\",\"name\":\"Come creare un istogramma con colori diversi in R - Stology\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/it\/#website\"},\"datePublished\":\"2023-07-19T21:36:32+00:00\",\"dateModified\":\"2023-07-19T21:36:32+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\"},\"description\":\"Questo tutorial spiega come creare un istogramma con colori diversi in R, incluso un esempio in R base e ggplot2.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/it\/r-istogramma-di-colori-diversi\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Casa\",\"item\":\"https:\/\/statorials.org\/it\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Come creare un istogramma con colori diversi in r\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/it\/#website\",\"url\":\"https:\/\/statorials.org\/it\/\",\"name\":\"Statorials\",\"description\":\"La tua guida all&#039;alfabetizzazione statistica!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/it\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"it-IT\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\",\"name\":\"Benjamin anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"it-IT\",\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/it\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/it\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin anderson\"},\"description\":\"Ciao, sono Benjamin, un professore di statistica in pensione diventato insegnante dedicato di Statorials. 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