Two histograms normalisation

Dear Rooters,

I hope I’ll be able to formulate my question properly:
I would like to draw in the same canvas two histograms which have different number of entries as if they have the same number of entries.
Can anyone suggest a way for me to do this?

Sincerely,
simon

Well, you could, for example, normalize your histograms or draw two separate “y” axes like in transpad.C or twoscales.C tutorials.