Hi, I am working on data analysis. I need to plot stacked histogram for two Files. File1: 1 2 3 3 4 4 File2: 4 5 6 6 7 7 7 How can i plot them on same graph? Thanks -- View this message in context: http://r.789695.n4.nabble.com/How-to-plot-stacked-histogram-in-R-tp4602369.html Sent from the R help mailing list archive at Nabble.com.