Plot style not working after Ubuntu 20 upgrade

wverbeke · December 20, 2020, 10:18pm

Dear experts,

I recently updated my laptop to Ubuntu 20, and am experiencing problems with the plots produced in ROOT. Whenever I produce plots on my laptop, several style options I set seem to be ignored/wrong. Running the same code before the OS upgrade, or currently on lxplus, or on a local cluster produces the desired output. To give an example:

on lxplus, on a local cluster, or also before the upgrade on my laptop, I would get the following output:
https://wverbeke.web.cern.ch/ROOT_plot_example/test_plot.pdf
running the same code in ubuntu 20 produces:
https://wverbeke.web.cern.ch/ROOT_plot_example/test_plot_new.pdf

I tried several versions of ROOT ( 6.20, 6.22 ), both installed by downloading the binary and also by compiling by source, yet the result is the same every time: the style options on the plot seem wrong and/or ignored. Do you have any idea what might be the cause of such an issue?

Thanks a lot in advance!

dastudillo · December 21, 2020, 5:05am

Maybe you had a rootlogon file that’s now missing?

wverbeke · December 21, 2020, 9:13am

I never used a rootlogon file so no. And simply copying the code to a clean environment on lxplus gives the desired output.

dastudillo · December 21, 2020, 10:17am

Does your code have any of SetTicks / SetTickx / SetTicky? By default, root does not draw the right-side and upper ticks, so if your macro doesn’t have SetTicks / SetTickx / SetTicky, they have to come from somewhere else (maybe .rootrc? or an included header setting a style?); if your code has those commands then the question would be why are they ignored or superseded.

wverbeke · December 21, 2020, 12:38pm

I don’t use .rootrc, and all plots run the following style file before being produced:

github.com

wverbeke/datacardPlotter/blob/master/style.py

import ROOT
from ROOT import gROOT, TStyle

def setStyle():

    style = TStyle( 'style', 'style' ) 
    
    style.SetCanvasBorderMode(0)
    style.SetCanvasColor(ROOT.kWhite)
    style.SetCanvasDefH(600)
    style.SetCanvasDefW(600)
    style.SetCanvasDefX(0)
    style.SetCanvasDefY(0)
    
    style.SetPadBorderMode(0)
    style.SetPadColor(ROOT.kWhite)
    style.SetPadGridX(False)
    style.SetPadGridY(False)
    style.SetGridColor(0)
    style.SetGridStyle(3)

This file has been truncated. show original

I only have style.SetPadTickX(1), style.SetPadTickY(1) there. But as far as I am aware I have no particular global settings in root at all.

couet · December 21, 2020, 5:34pm

The changed in style should come from somewhere.
try to run with root -n in the place it works for you. That way
you will avoid the external setting and you should get what you get in the new plot.

wverbeke · December 21, 2020, 8:19pm

I am running a python script that calls ROOT, and changing it into a ROOT macro I can run in the command line usiong “root -n” will be fairly involved. Is there a way I could flag .rootrc to be ignored inside the python script? I can not seem to find a way to do this.

dastudillo · December 22, 2020, 4:16am

So if this style.py file is configuring the drawing style and is read and used correctly in the other machines, it could be that it is not being found in your new Ubuntu; try printing a message from this file (and before calling it) to know whether it is being read in the first place.

wverbeke · December 22, 2020, 8:06am

Thanks for the suggestion. I verified that indeed in all cases the style function is in fact run, both on my laptop and remotely where the plot is produced correctly. I also verified explicitly there are no code differences at all.

system · January 5, 2021, 8:06am

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