Create TH2 with not equal sized bins

ROOT
1

Hello

I am trying to build a TH2 like

[code]
int nPtBins = 5;
float ptBins[6] = {20,25,30,40,60,1000};

int nEtaBins = 3;
float etaBins[4] = {0,0.9,1.2,2.4};

TH2D * tfr = new TH2D(“tfr”, “tfr”, nPtBins, ptBins, nEtaBins, etaBins);[/code]

but the GridX shows like it is equal sized histo - -

Screen Shot 2015-12-09 at 12.39.57.png666×598 4.77 KB


Can I make the Grid to be adapted according to my binning ?

Thanks in advance

2

No. The grid has no link with the binning. It is lines on the main tick marks.

3

when your histogram will be filled you will see the various bin sizes when plotting for instance with the option COL or BOX