Canvas in root file, axis after loading not the same

ROOT
1

Hi,

I have saved a plot (a canvas with axis and histograms) in a root file and now I need to change some labels in it. The problem is that after loading the canvas from file and drawing it, the axis are not the same as I saved them:
-The axis range is different, but I can live with that.
-The axis ticks are behind the histograms, how can I change that?

Cheers
Duc

2

It should not behave that way… can you provide a small macro reproducing this effect ?

3

Hi,

as I said at creation time it looked fine, but after loading from the root file that you find here: /afs/naf.desy.de/user/d/dbta/public/root/DIL_emu_JETN_bg.root
I have this problem with the axis.
In the same directory you can see the .gif .eps and .pdf version of the plot.

Thanks
Duc

4

Thanks for your files. I see that the ROOT file gives a different picture from the one showed by the other files. To debug this further we would need the original macro which generated these files.

5

Hi,

the macro is not so easy to use, since it is quite complex. Basically I add up 50 histograms in certain groups and then put them together into a THStack. Together with a legend and a label this is all drawn on a canvas.
All this is done with a certain “ATLAS” style and in python. In then end I just do c1.SaveAs(“test.root”).
Anything else I should look at?

Cheers
Duc

6

May be try to save it as a “.C” file (SaveAs(“test.C”):wink: and send us the test.C file. Then we could try to generate the .root file from it and see if we can reproduce your problem.

7

Hi,
I have got an update, the problem only occurs if I used root 5.22.00, not if I use 5.20.00. I think the file was created with 5.20.00. Could this be the source of the problem?

Cheers
Duc

8

I do not see any difference in the X axis (what differences do you see?)
I see that the y axis is hidden by the fill area of your histograms.
To solve this problem, simply do

c1.Draw(); c1.redrawAxis();
Rene

9

Hi,

with my root 5.22.00 version I also cannot see the ticks of the x-axis. The trick with c1.RedrawAxis() does not work for me, the axis ticks are still underneath the histogram.

Cheers
Duc

10

Hi,

I tried to convert the c1 into a .C file and when executing the .C file I see the same flaw: the axis ticks are behind the histograms (still only in root 5.22.00).

I have copied the .C file into the same directory, maybe you spot something.

Cheers
Duc

11

I ran your macro with the latest ROOT version. I see the tick marks. I saved the produced canvas in a ROOT file and redisplayed it: I get the same picture.

12

Hi,
yes, I can confirm that this problem is gone with root 5.24.00 (which is not yet installed at my place), sorry for making the noise,

Duc