How to add more margin to a heatmap.2 plot with the png device?

heatmap, margins, png, r

Solution

col = c("#FF0000", "#FF0000", "#FF0000")
par(mar=c(7,4,4,2)+0.1) 
png(filename='test.png', width=800, height=750)
heatmap.2(sel, col=redgreen(75), scale="row", ColSideColors=col,
                     key=TRUE, symkey=FALSE, density.info="none",cexRow=1,cexCol=1,margins=c(12,8),trace="none",srtCol=45)
graphics.off()

Problem

I have the following example data: ``` sel = structure(c(1.29955, 2.52295, 1.11021, 2.52008, 8.20255, 8.50118, 5.82189, 5.8108, 1.55928, 8.2552, 5.25119, 5.55055, 1.22525, 3.152, 3.9299, 5.50921, 5.25591, 5.11218, 1.55951, 2.5525, 9.2358, 2.0928, 5.2538, 2.5539, 8.52592, 2.59521, 5.55858, 5.92955, 2.22089, 1.52105), .Dim = c(10L, 3L), .Dimnames = list(c("a", "b", "c", "d", "e", "f", "g", "h", "i", "j"), c("Label.1", "Label.2", "Label.3"))) ``` And I use this code to plot the figure: ``` col = c("#FF0000", "#FF0000", "#FF0000") par(mar=c(7,4,4,2)+0.1) png(filename='test.png', width=800, height=750) heatmap.2(sel, col=redgreen(75), scale="row", ColSideColors=col, key=TRUE, symkey=FALSE, density.info="none", trace="none") graphics.off() ``` Which gives me this heatmap: As you can see, the x-axis labels are cut off. I tried to make the margins larger with `par(mar=c(7,4,4,2)+0.1)` (from the default `par(mar=c(5,4,4,2)+0.1)`) but that does not change how the label is cut off. I tried changing the `lmat`, `lhei` and `lwid` options in heatmap.2, so that it is: ``` heatmap.2(zebrafishSel, col=redgreen(75), scale="row", ColSideColors=zebracolors, key=TRUE, symkey=FALSE, density.info="none", trace="none", lmat=rbind(c(2),c(3),c(1),c(4)), lhei=c(1,1,9,0), lwid=c(1)) ``` but this gives the error `Error in plot.new() : outer margins too large (figure region too small)` How can I enlarge the margin with heatmap.2 and the png device?

Original source