understanding cex (R plots)

Hi,

I try to make multiple plots look as similar as possible.


I create each plot with pdf(), using the same height but different width in inch.
For some plots I use the layout() function to draw multiple subplots side by side in one pdf.

For each plot I use the same cex values for the different plotting functions
(cex.axis, cex.lab, cex.points etc.)

Still, when I compare the pdf's the axis labels, titles etc. have different size factors!

Is that expected?

I thought by fixing the height parameter and using the same character expansion values I would end up with similar plots
(and especially same font size across pdfs).

How can I make sure that across multiple plot calls the character expansion level (font size) is the same?



thanks!