Change z-axis limits of a 2D TEfficiency graph

Newbie
1

Hello,

I am making a 2D TEfficiency plot and I would like the range of the z-axis (on the color palette) to be from 0 to 1.2. I tried to use SetMinimum and SetMaximum but they wouldn’t work as ‘TEfficiency’ object has no attribute ‘SetMaximum’. Is there a way to do this?

Thank you,
Carry

2

TEfficiency does not have a GetHistogram either. But it has CreateHistogram which returns a *TH2 on which, I guess, you can call SetMaximum and SetMinimum to change the Z axis range. I let @moneta confirm.

3

Hi,
For changing the limits of the plotted 2D TEfficiency object, you can call CreateHistogram but then you need to draw that objecty. Otherwise, after having called TEfficiency::Draw(), you can call TEfficiency::GetPaintedHistogram() to get a pointer to the histogram that is painted and afterwards you can change its attributes as you wish.

Lorenzo

4

Thanks @moneta I missed that one. And I should have find it as you already answered this question on the forum : Set range y axis TEfficiency
Sorry.
BTW: I see that “GetPaintedHistogram” has no help. I agree the name of the function is explicit enough but may be we can had some example showing how to set the min and max. Like in the previous post.

5

BTW. It also seems a good idea to explain when (for what) to use TEfficiency::GetPaintedGraph versus TEfficiency::GetPaintedHistogram.

6

It is documented in Tefficiency::Paint(), we should maybe add a link to there from the documentation of TEfficiency::GetPaintedHistogram

Lorenzo

7

It works. Thank you guys!