Superimposition of two TGraph2D with different color sets

ROOT
1

Hi,

I would like to know if it is possible to superimpose a TGraph2D made with a specific colored palette, and another TGraph2D made with a greyscale palette.

I tried a lot, but I did not manage to do that. Any idea?

Thanks,
Alexandre

2

Sometimes it is possible.
You have to draw with color pallet and update (!!!) the image
gPad->Modified(), gPad->Update() should do the job.
Then carfully :wink: change the palette and draw the second image (I would advice to use a dedicated TCanvas).

The result will be fragile :blush: though. This means as soon as you “touch” your former TCanvas it is to be redrawn with the later TCanvas palette :open_mouth:

Can you check whether it works for you?

3

Also have a look at:

root.cern.ch/phpBB2/viewtopic.ph … ight=texec

4

Yes, this should help. However the result is still fragile. As soon as the number of the TCanvas more then two one should not have forgotten to apply the approach root.cern.ch/phpBB2/viewtopic.ph … ight=texec for each :exclamation: TCanvas in his/her application.

5

Thank you, I will try what you proposed me as soon as possible!

Alexandre