GetUmin(), GetUmax() show wrong results for the canvases with the log scale

ROOT
1 
#!/usr/bin/env python3
import ROOT

ROOT.gStyle.Reset()

canvas = ROOT.TCanvas()
canvas.SetGridx()
canvas.SetGridy()
frame = canvas.DrawFrame(0.1,0.1,10.,10.)
print("Minimum value on the X axis: ", canvas.GetUxmin())
print("Maximum value on the X axis: ", canvas.GetUxmax())
canvas.SetLogx()
frame.GetXaxis().SetRangeUser(0.1, 10.)
canvas.Modified()
canvas.Update()
print("Minimum value on the X axis: ", canvas.GetUxmin())
print("Maximum value on the X axis: ", canvas.GetUxmax())

Output:

Minimum value on the X axis:  0.1
Maximum value on the X axis:  10.0
Minimum value on the X axis:  -1.0
Maximum value on the X axis:  1.0
2

Hello @FoxWise,

thanks for reaching out!
As stated in the documentation, GetUxmin returns the logarithmic value if log scale is set.

Cheers,
Monica

3

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