{"id":1136,"date":"2023-07-27T13:17:13","date_gmt":"2023-07-27T13:17:13","guid":{"rendered":"https:\/\/statorials.org\/it\/scala-logaritmica-ggplot2\/"},"modified":"2023-07-27T13:17:13","modified_gmt":"2023-07-27T13:17:13","slug":"scala-logaritmica-ggplot2","status":"publish","type":"post","link":"https:\/\/statorials.org\/it\/scala-logaritmica-ggplot2\/","title":{"rendered":"Come creare una scala logaritmica in ggplot2"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Spesso potresti voler convertire la scala dell&#8217;asse x o dell&#8217;asse y di un grafico ggplot2 in una scala logaritmica.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Puoi utilizzare uno dei due metodi per farlo utilizzando solo ggplot2:<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>1. Utilizza scale_y_continuous() o scale_x_continuous()<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>ggplot(df, <span style=\"color: #3366ff;\">aes<\/span> (x=x, y=y)) +\n  geom_point() +\n  scale_y_continuous(trans=' <span style=\"color: #008000;\">log10<\/span> ') +\n  scale_x_continuous(trans=' <span style=\"color: #008000;\">log10<\/span> ')\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\"><strong>2. Usa coordinate_trans()<\/strong><\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>ggplot(df, <span style=\"color: #3366ff;\">aes<\/span> (x=x, y=y)) +\n  geom_point() +\n  coord_trans(y = ' <span style=\"color: #008000;\">log10<\/span> <span style=\"color: #000000;\">'<\/span> , x=' <span style=\"color: #008000;\">log10<\/span> ')<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Se desideri formattare le etichette degli assi per visualizzare gli esponenti, puoi utilizzare le funzioni nel pacchetto <a style=\"color: #000000;\" href=\"https:\/\/cran.r-project.org\/web\/packages\/scales\/scales.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">scales<\/a> :<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>ggplot(df, <span style=\"color: #3366ff;\">aes<\/span> (x=x, y=y)) +\n  geom_point() +\n  scale_y_continuous(trans=' <span style=\"color: #008000;\">log10<\/span> ',\n                     breaks= <span style=\"color: #3366ff;\">trans_breaks<\/span> (' <span style=\"color: #008000;\">log10<\/span> ', <span style=\"color: #3366ff;\">function<\/span> (x) 10^x),\n                     labels= <span style=\"color: #3366ff;\">trans_format<\/span> (' <span style=\"color: #008000;\">log10<\/span> ', <span style=\"color: #3366ff;\">math_format<\/span> (10^.x)))<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Questo tutorial mostra esempi di come utilizzare queste funzioni nella pratica.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Esempio 1: scala logaritmica utilizzando scale_y_continuous()<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come utilizzare la funzione <strong>scale_y_continuous()<\/strong> per creare una scala logaritmica per l&#8217;asse y di un grafico a dispersione:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #993300;\">library<\/span> (ggplot2)\n\n<span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data.frame(x=c(2, 5, 6, 7, 9, 13, 14, 16, 18),\n                 y=c(1400, 1700, 2300, 2500, 2800, 2900, 3400, 3900, 11000))\n\n<span style=\"color: #008080;\">#create scatterplot with log scale on y-axis<\/span>\nggplot(df, <span style=\"color: #3366ff;\">aes<\/span> (x=x, y=y)) +\n  geom_point() +\n  scale_y_continuous(trans=' <span style=\"color: #008000;\">log10<\/span> ')\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11427 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/logscaleggplot1.png\" alt=\"Scala logaritmica sull'asse y di ggplot2\" width=\"442\" height=\"438\" srcset=\"\" sizes=\"\"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Esempio 2: scala logaritmica utilizzando coord_trans()<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come utilizzare la funzione <strong>coord_trans()<\/strong> per creare una scala logaritmica per l&#8217;asse y di un grafico a dispersione:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #993300;\">library<\/span> (ggplot2)\n\n<span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data.frame(x=c(2, 5, 6, 7, 9, 13, 14, 16, 18),\n                 y=c(1400, 1700, 2300, 2500, 2800, 2900, 3400, 3900, 11000))\n\n<span style=\"color: #008080;\">#create scatterplot with log scale on y-axis<\/span>\nggplot(df, <span style=\"color: #3366ff;\">aes<\/span> (x=x, y=y)) +\n  geom_point() +\n  coord_trans(y=' <span style=\"color: #008000;\">log10<\/span> ')<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11428 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/logscaleggplot2.png\" alt=\"Scala logaritmica ggplot2\" width=\"450\" height=\"441\" srcset=\"\" sizes=\"\"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Esempio 3: etichette in scala logaritmica personalizzate<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Il codice seguente mostra come utilizzare le funzioni nel pacchetto <strong>scales<\/strong> per creare una scala logaritmica per l&#8217;asse y di un grafico a dispersione e aggiungere etichette personalizzate con esponenti:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #993300;\">library<\/span> (ggplot2)\n<span style=\"color: #993300;\">library<\/span> (scales)\n\n<span style=\"color: #008080;\">#create data frame<\/span>\ndf &lt;- data.frame(x=c(2, 5, 6, 7, 9, 13, 14, 16, 18),\n                 y=c(1400, 1700, 2300, 2500, 2800, 2900, 3400, 3900, 11000))\n\n<span style=\"color: #008080;\">#create scatterplot with log scale on y-axis and custom labels<\/span>\nggplot(df, <span style=\"color: #3366ff;\">aes<\/span> (x=x, y=y)) +\n  geom_point() +\n  scale_y_continuous(trans=' <span style=\"color: #008000;\">log10<\/span> ',\n                     breaks= <span style=\"color: #3366ff;\">trans_breaks<\/span> (' <span style=\"color: #008000;\">log10<\/span> ', <span style=\"color: #3366ff;\">function<\/span> (x) 10^x),\n                     labels= <span style=\"color: #3366ff;\">trans_format<\/span> (' <span style=\"color: #008000;\">log10<\/span> ', <span style=\"color: #3366ff;\">math_format<\/span> (10^.x)))<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11429 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/logscaleggplot3.png\" alt=\"Scala logaritmica con esponenti in ggplot2\" width=\"451\" height=\"452\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Si noti che le etichette dell&#8217;asse Y hanno esponenti, a differenza dei due grafici precedenti.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Risorse addizionali<\/strong><\/span><\/h3>\n<p> <a href=\"https:\/\/statorials.org\/it\/titolo-ggplot2\/\" target=\"_blank\" rel=\"noopener noreferrer\">La guida completa ai titoli ggplot2<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/i-migliori-temi-ggplot2\/\" target=\"_blank\" rel=\"noopener noreferrer\">Una guida completa ai migliori temi ggplot2<\/a><br \/> <a href=\"https:\/\/statorials.org\/it\/grafici-affiancati-ggplot2\/\" target=\"_blank\" rel=\"noopener noreferrer\">Come creare grafici affiancati in ggplot2<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Spesso potresti voler convertire la scala dell&#8217;asse x o dell&#8217;asse y di un grafico ggplot2 in una scala logaritmica. Puoi utilizzare uno dei due metodi per farlo utilizzando solo ggplot2: 1. Utilizza scale_y_continuous() o scale_x_continuous() ggplot(df, aes (x=x, y=y)) + geom_point() + scale_y_continuous(trans=&#8217; log10 &#8216;) + scale_x_continuous(trans=&#8217; log10 &#8216;) 2. Usa coordinate_trans() ggplot(df, aes (x=x, [&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 una scala logaritmica in ggplot2 \u2013 Statorials<\/title>\n<meta name=\"description\" content=\"Questo tutorial spiega come creare una scala logaritmica in R utilizzando ggplot2, con diversi esempi.\" \/>\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\/scala-logaritmica-ggplot2\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Come creare una scala logaritmica in ggplot2 \u2013 Statorials\" \/>\n<meta property=\"og:description\" content=\"Questo tutorial spiega come creare una scala logaritmica in R utilizzando ggplot2, con diversi esempi.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/it\/scala-logaritmica-ggplot2\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T13:17:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/logscaleggplot1.png\" \/>\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\/scala-logaritmica-ggplot2\/\",\"url\":\"https:\/\/statorials.org\/it\/scala-logaritmica-ggplot2\/\",\"name\":\"Come creare una scala logaritmica in ggplot2 \u2013 Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/it\/#website\"},\"datePublished\":\"2023-07-27T13:17:13+00:00\",\"dateModified\":\"2023-07-27T13:17:13+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/it\/#\/schema\/person\/0896f191fb9fb019f2cd8623112cb3ae\"},\"description\":\"Questo tutorial spiega come creare una scala logaritmica in R utilizzando ggplot2, con diversi esempi.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/it\/scala-logaritmica-ggplot2\/#breadcrumb\"},\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/it\/scala-logaritmica-ggplot2\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/it\/scala-logaritmica-ggplot2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Casa\",\"item\":\"https:\/\/statorials.org\/it\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Come creare una scala logaritmica in ggplot2\"}]},{\"@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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