https://communities.sas.com/t5/Graphics-Programming/Concentration-map/m-p/66658#M2292 Hi all,<BR /> <BR /> I have a dataset with x and y variables. I want to plat these variables on an x-y plot and overlay a heat map that shows the concentration of the points at a given area on the chart. So, the more (x-y-)points there are closely around a point, the darker/redder the colour. of the heat map.<BR /> <BR /> Does anyone have any ideas of how to represent that?<BR /> <BR /> Many thanks,<BR /> <BR /> Chris Tue, 24 Aug 2010 08:50:22 GMT CJ 2010-08-24T08:50:22Z https://communities.sas.com/t5/Graphics-Programming/Concentration-map/m-p/66658#M2292 Hi all,<BR /> <BR /> I have a dataset with x and y variables. I want to plat these variables on an x-y plot and overlay a heat map that shows the concentration of the points at a given area on the chart. So, the more (x-y-)points there are closely around a point, the darker/redder the colour. of the heat map.<BR /> <BR /> Does anyone have any ideas of how to represent that?<BR /> <BR /> Many thanks,<BR /> <BR /> Chris Tue, 24 Aug 2010 08:50:22 GMT https://communities.sas.com/t5/Graphics-Programming/Concentration-map/m-p/66658#M2292 CJ 2010-08-24T08:50:22Z https://communities.sas.com/t5/Graphics-Programming/Concentration-map/m-p/66659#M2293 There are ways to color the areas behind the plot markers in a gplot (using annotate). And you could do some calculations on the data to do summary counts of the number of obsns/markers in each area, and color the areas accordingly.<BR /> <BR /> I don't have an example that does that 'exact' thing, but here's one that is close:<BR /> <BR /> <A href="http://robslink.com/SAS/democd22/heatmap.htm" target="_blank">http://robslink.com/SAS/democd22/heatmap.htm</A><BR /> <BR /> <A href="http://robslink.com/SAS/democd22/heatmap_info.htm" target="_blank">http://robslink.com/SAS/democd22/heatmap_info.htm</A> Tue, 24 Aug 2010 12:46:28 GMT https://communities.sas.com/t5/Graphics-Programming/Concentration-map/m-p/66659#M2293 GraphGuy 2010-08-24T12:46:28Z