Equal pad size in TCanvas with one common axis

[Wile_E_Coyote]

Dividing a TCanvas such that the plots are the same size

I would like to divide a TCanvas so that I can have multiple plots with no margins between them, as in this example (root.cern.ch/root/html/tutorials … nes.C.html). When you use TCanvas::Divide it divides the canvas into pads and then each plot is drawn in one of these pads. This is problematic because the bottom row and left column need to contain the axes labels and titles so they end up with smaller areas for actual plotting. With a number of divisions this can be an extremely noticeable and …

TCanvas::Divide leaves unfilled margin

A brutal fix … canvas->Divide(2, 2, 1E-11, 1E-11); // BOTH, “xmargin” and “ymargin”, MUST BE > 0 (I assume Olivier will comment on this issue in a more detailed way -> especially, why pads are not equal in size when any one of “[x|y]margin” is 0. Actually, each pad has a different size in these cases. I can understand that there’s some free space on top for the canvas’es title, but what’s the purpose of the free space on the right side?)