hey Sarah, thanks for your help !! Of Course I put the second quote also (I forgot to put it on the last post). Sorry, I don't get the my.plot.code... # I'm new in R and use it only to draw heatmaps right now. Well, I did forget the dev.off(). # but I got null device (1) # when quartz is turned off and when it's on I get : " quartz 2".
But I don't have any files called "heatmap.2.png " on my computer. I really don't understand why I don't get anything ! and when I do: > jpeg ("heatmap.jpg") # it works but I get only a 20kb picture which is > useless in my case (edit and work on it in photoshop) Fred -- View this message in context: http://r.789695.n4.nabble.com/how-to-save-a-heatmap-2-in-png-jpeg-tiff-tp4642607p4642615.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.