Combined raster+vector postscript

ROOT
1

Hi,

I have a TGraph with ~100,000 points that I’m plotting with Draw(“AP”).
On top of this, I’m drawing some contours from a separate TH2 object.

My problem is, when I save the canvas as a .eps file and look at it, all of the 100,000 points are individually drawn, and this takes a long time. I could get around this by using a raster format, but I don’t want to lose the vector quality of the rest of the lines and things in the diagram.

It should be possible to encapsulate a raster image into a .eps? Can root do this? Or is there another, more clever, way to do this?

2

Are you sure that, if you do the whole picture in raster mode, you are losing that much in quality ? have you tried the gif or png formats ? If you need an high number of pixels you can make a large TCanvas.

3

Well, it’s for a publication, so “that much” is actually quite small.

I think I’ve found an acceptable solution by making separate canvases for the raster and vector pieces and combining them using Inkscape.

4

If the size of the file is an issue try to use PDF instead of PS. It will not help for the generation time.