I have now advanced to image.plot from the "fields" package, which gives a nice color scalebar:
image.plot(dat,col=imagecolsmat,xlab="time",ylab="abs") All that is left now is to change the scale on the x and y axis from 0 to 1 to the actual values. I do not understand why it does not read the proper values from my data matrix. Here is the first part of it: dat[1:10,1:10] abs time 5 6 7 8 9 10 11 12 13 14 0.248175182 1 0 1 0 0 0 0 0 0 0 0.372262774 1 0 1 0 0 0 0 0 0 0 0.496350365 1 0 1 0 0 0 0 0 0 0 0.620437956 2 0 1 0 0 0 0 0 0 0 0.744525547 2 1 0 0 0 0 0 0 0 0 0.868613139 2 1 0 0 0 0 0 0 0 0 0.99270073 0 2 1 0 0 0 0 0 0 0 1.116788321 0 3 0 0 0 0 0 0 0 0 1.240875912 0 1 2 0 0 0 0 0 0 0 1.364963504 0 0 1 3 1 0 0 0 0 0 It seems as if the first row and column are disregarded and the data is rescaled to fit between 0 and 1. It seems I'm so close, but I can't seem to figure this one out... This is what I get so far: http://r.789695.n4.nabble.com/file/n3341466/test.jpg -- View this message in context: http://r.789695.n4.nabble.com/re-arranging-data-to-create-an-image-or-heatmap-tp3327986p3341466.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.