There is a change in the drawing of the graph image！

ROOT
1

Klein-Nishina Formula:
Here’s my code for using TGraphPolar for plotting.
compton.cpp (2.3 KB)
Why does drawing four graphs give a different result than drawing just the fourth graph?

graph-4
graph-41682×947 40.4 KB

graph-1
graph-11753×956 33 KB

2

I’ll check

3

The first graph drawn defines the axis. If you want both plots to have the same axis definition, always draw the same graph first.

compton.cpp (2.1 KB)

Screenshot 2024-11-20 at 09.56.07
Screenshot 2024-11-20 at 09.56.071920×920 222 KB

4

Thanks for your help.

5

Also as it seems you are in Radian, you need the following lines after drawing:

   c1->Update();
   grP4->GetPolargram()->SetToRadian();