{"id":1718,"date":"2011-08-11T12:18:59","date_gmt":"2011-08-11T06:48:59","guid":{"rendered":"http:\/\/blog.fusioncharts.com\/?p=1718"},"modified":"2026-01-20T14:36:35","modified_gmt":"2026-01-20T09:06:35","slug":"a-guide-to-the-heat-map-chart","status":"publish","type":"post","link":"https:\/\/www.fusioncharts.com\/blog\/a-guide-to-the-heat-map-chart\/","title":{"rendered":"A Guide to Heat Map Charts: Visualizing Data Density"},"content":{"rendered":"<p>Let&#8217;s say you want to go out for an expensive dinner. But since it is expensive, you want to make an informed decision about where to go. So you pick up a set of magazines that review such restaurants. And to help you decide, you plot the ratings in a visual format, say a separate column chart for each magazine.<\/p>\r\n\r\n<!--more-->\r\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1767\" title=\"Restaurant Ratings by Gourmet News\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-11.png\" alt=\"\" height=\"290\" width=\"560\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-11.png 560w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-11-150x78.png 150w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1816\" title=\"Restaurant Ratings by Cookbook Digest\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-22.png\" alt=\"\" height=\"290\" width=\"560\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-22.png 560w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-22-150x78.png 150w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1817\" title=\"Restaurant Ratings by Restaurant Mag\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-33.png\" alt=\"\" height=\"290\" width=\"560\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-33.png 560w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-33-150x78.png 150w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1771\" title=\"Restaurant Ratings by Food Magazine\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-41.png\" alt=\"\" height=\"290\" width=\"560\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-41.png 560w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-41-150x78.png 150w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1772\" title=\"Restaurant Ratings by Restaurant Business\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-51.png\" alt=\"\" height=\"290\" width=\"560\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-51.png 560w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-51-150x78.png 150w\" sizes=\"auto, (max-width: 560px) 100vw, 560px\" \/><\/p>\r\n\r\n\r\n<p>The column charts do a great job of bringing out the highs and the lows in the ratings. You can easily see that <em>Noma<\/em> and <em>The Fat Duck<\/em> come highly recommended by <em>Gourmet News<\/em>, and <em>Le Benardin<\/em> is best avoided. But knowing how subjective these ratings are, which the column charts clearly show, wouldn&#8217;t you like to consider all the ratings at once to make your decision?<\/p>\r\n\r\n<h2>Bring in the Heat Map Chart<\/h2>\r\n<p>The Heat Map Chart represents data in a tabular format with user-defined color ranges like low, average and high. So putting together all the ratings from different magazines, you will arrive at the following heat map chart. [Explore more <a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/standard-charts\/heat-map-chart\" target=\"_blank\" rel=\"noopener\">Heat Map Charts<\/a>] <img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1818\" title=\"Heat Map chart showing Restaurant Ratings\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-96.png\" alt=\"\" height=\"347\" width=\"595\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-96.png 595w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-96-150x87.png 150w\" sizes=\"auto, (max-width: 595px) 100vw, 595px\" \/><\/p>\r\n\r\nAs you can see, the condensed color-coded format of the Heat Map chart makes the data much more easy to understand. You have your ratings for each restaurant effectively categorized under the Poor, Average, Good and Best ranges.\r\n\r\nYou can also selectively hide or show any range as well. For example, you can see values only in the Best range by &#8220;switching off&#8221; all other ranges from the legend.\r\n\r\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1775\" title=\"A Heat Map chart with a selected range\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-103.png\" alt=\"\" height=\"346\" width=\"595\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-103.png 595w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-103-150x87.png 150w\" sizes=\"auto, (max-width: 595px) 100vw, 595px\" \/>\r\n\r\nNow how about taking it a step further? Rather than having predefined ranges, how about choosing your own range on the chart itself?\r\n<h2>Bring in the gradient legend<\/h2>\r\nThe gradient legend is a continuous range, instead of being broken into three discrete ranges. This affects the rest of the chart as well since the data sets pick their color from where their value falls in the gradient range instead of one of the three discrete values.\r\n\r\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1776\" title=\"A Heat Map chart with a Gradient Legend\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-62.png\" alt=\"\" height=\"345\" width=\"596\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-62.png 596w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-62-150x87.png 150w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/>\r\n<p>You just have to drag the pointers to select whatever range you want.<\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1777\" title=\"A Heat Map chart with a selected range\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-72.png\" alt=\"\" height=\"345\" width=\"595\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-72.png 595w, \/blog\/wp-content\/uploads\/2011\/08\/FusionCharts-Heatmap-72-150x87.png 150w\" sizes=\"auto, (max-width: 595px) 100vw, 595px\" \/><\/p>\r\n<p>Isn&#8217;t it much easier to choose a restaurant using the Heat Map chart? Of course, you wouldn&#8217;t be creating a Heat Map chart every time you need to choose a restaurant. So let&#8217;s take a look at some of the more business uses of the chart.<\/p>\r\n\r\n<h2>Applications of the Heat Map Chart<\/h2>\r\n\r\n\r\nA heat map chart can be used to visualize complex data like performance comparison of different companies, market response, stock market investments, and lots more.\r\n<p>In the chart below, we are visualizing the weekly CPU utilization of 23 computers in a network. Here you can easily know which computers have logged extreme values. If it were not for the heat map chart, the data would have been visualized using separate column or line charts which would&#8217;ve been very cumbersome.<\/p>\r\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1784\" title=\"CPU Utilization Heat Map Chart\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/CPU.png\" alt=\"\" height=\"347\" width=\"596\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/CPU.png 596w, \/blog\/wp-content\/uploads\/2011\/08\/CPU-150x87.png 150w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/><\/p>\r\n\r\n\r\n<p>It is a similar case with a huge marketing data set. From the heat map chart below, you can easily point out the best performing mediums versus the loss-making mediums. Instantaneous understanding is where the heat map chart scores highly.<\/p>\r\n\r\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1785\" title=\"Marketing Data in a Heat Map Chart\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/Marketing.png\" alt=\"\" height=\"347\" width=\"597\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/Marketing.png 597w, \/blog\/wp-content\/uploads\/2011\/08\/Marketing-150x87.png 150w\" sizes=\"auto, (max-width: 597px) 100vw, 597px\" \/>\r\n<p>In the Weekly Performance chart below, it is very easy to distinguish the high performers from the laggards because of the color gradations.<\/p>\r\n\r\n<img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1786\" title=\"Corporate Performance in a Heat Map Chart\" src=\"https:\/\/www.fusioncharts.com\/blog\/wp-content\/uploads\/2011\/08\/Performance.png\" alt=\"\" height=\"345\" width=\"596\" srcset=\"\/blog\/wp-content\/uploads\/2011\/08\/Performance.png 596w, \/blog\/wp-content\/uploads\/2011\/08\/Performance-150x87.png 150w\" sizes=\"auto, (max-width: 596px) 100vw, 596px\" \/>\r\n\r\n\r\n\r\n\r\n<p>This was all about the heat map chart. You can use it to visualize large amounts of data, and your analysis will be much quicker because of the color gradations. You can see more examples, read more about the heat map chart and download it from <a href=\"https:\/\/www.fusioncharts.com\/dev\/chart-guide\/standard-charts\/heat-map-chart\">here<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Let&#8217;s say you want to go out for an expensive dinner. But since it is expensive, you want to make an informed decision about where to go. So you pick up a set of magazines that review such restaurants. And to help you decide, you plot the ratings in a visual format, say a separate [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[81,179,290],"coauthors":[715],"class_list":["post-1718","post","type-post","status-publish","format-standard","hentry","category-charting-guidelines","tag-column","tag-heat-map-chart","tag-powercharts"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A Guide to Heat Map Charts: Visualizing Data Density<\/title>\n<meta name=\"description\" content=\"Make informed decisions with heat map charts. 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