{"id":5164,"date":"2022-08-27T01:06:08","date_gmt":"2022-08-26T19:36:08","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-r-ggplot-how-to-automatically-set-point-color-based-on-values\/"},"modified":"2022-08-27T01:06:08","modified_gmt":"2022-08-26T19:36:08","slug":"solved-r-ggplot-how-to-automatically-set-point-color-based-on-values","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-r-ggplot-how-to-automatically-set-point-color-based-on-values\/","title":{"rendered":"[Solved] R &#8211; ggplot &#8211; How to automatically set point color based on values?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-48615412\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"48615412\" data-parentid=\"48614328\" data-score=\"3\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>I had a discussion with the OP using his data. One of his issues was to make <code>scale_colour_gradient2()<\/code> work. The solution was to set up a midpoint value. By default, it is set at 0 in the function. In his case, he has a continuous variable that has about 50 as median. <\/p>\n<pre><code>library(ggmap)\nlibrary(ggplot2)\nlibrary(RColorBrewer)\n\nEurope2 &lt;- get_map(maptype = \"toner-2011\", location = \"Europe\", zoom = 4) \n\nggmap(Europe2) +\ngeom_point(data = Cluster, aes(x = LON, y = LAT, color = Mean, shape = H\u00f6he &gt; 700), size = 1.5, alpha = 0.4) + \nscale_shape_manual(name = \"Altitude\", values = c(19, 17)) + \nscale_colour_gradient2(low = \"#3288bd\", mid = \"#fee08b\", high = \"#d53e4f\",\n                       midpoint = median(Cluster$Mean, rm.na = TRUE))\n<\/code><\/pre>\n<p><a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/jassweb.com\/solved\/wp-content\/uploads\/2022\/08\/Solved-R-ggplot-How-to-automatically-set-point.jpg\"><img decoding=\"async\" src=\"https:\/\/jassweb.com\/solved\/wp-content\/uploads\/2022\/08\/Solved-R-ggplot-How-to-automatically-set-point.jpg\" alt=\"enter image description here\"><\/a><\/p>\n<p>It seems that the colors are not that good in the map given values seem to tend to stay close to the median value. I think the OP needs to create a new grouping variable with <code>cut()<\/code> and assign colors to the groups or to use another scale_color type of function. I came up with the following with the RColorBrewer package. I think the OP needs to consider how he wanna use colors to brush up his graphic.<\/p>\n<pre><code>ggmap(Europe2) +\ngeom_point(data = Cluster, aes(x = LON, y = LAT, color = Mean, shape = H\u00f6he &gt; 700), size = 1.5, alpha = 0.4) + \nscale_shape_manual(name = \"Altitude\", values = c(19, 17)) + \nscale_colour_distiller(palette = \"Set1\")  \n<\/code><\/pre>\n<p><a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/jassweb.com\/solved\/wp-content\/uploads\/2022\/08\/1661542568_708_Solved-R-ggplot-How-to-automatically-set-point.jpg\"><img decoding=\"async\" src=\"https:\/\/jassweb.com\/solved\/wp-content\/uploads\/2022\/08\/1661542568_708_Solved-R-ggplot-How-to-automatically-set-point.jpg\" alt=\"enter image description here\"><\/a><\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved R &#8211; ggplot &#8211; How to automatically set point color based on values? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] I had a discussion with the OP using his data. One of his issues was to make scale_colour_gradient2() work. The solution was to set up a midpoint value. By default, it is set at 0 in the function. In his case, he has a continuous variable that has about 50 as median. library(ggmap) library(ggplot2) &#8230; <a title=\"[Solved] R &#8211; ggplot &#8211; How to automatically set point color based on values?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-r-ggplot-how-to-automatically-set-point-color-based-on-values\/\" aria-label=\"More on [Solved] R &#8211; ggplot &#8211; How to automatically set point color based on values?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[1260,1119,1259,321],"class_list":["post-5164","post","type-post","status-publish","format-standard","hentry","category-solved","tag-ggmap","tag-ggplot2","tag-gradient","tag-r"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] R - ggplot - How to automatically set point color based on values? - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-r-ggplot-how-to-automatically-set-point-color-based-on-values\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] R - ggplot - How to automatically set point color based on values? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] I had a discussion with the OP using his data. One of his issues was to make scale_colour_gradient2() work. The solution was to set up a midpoint value. By default, it is set at 0 in the function. In his case, he has a continuous variable that has about 50 as median. library(ggmap) library(ggplot2) ... 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