A problem about changing the labels on the axis

ROOT
1

I want to go from the first graph to the second graph.Can you help me?Thank you very much！
%E6%8D%95%E8%8E%B7 %E6%8D%95%E8%8E%B7%20-%20%E5%89%AF%E6%9C%AC __
ROOT Version: Not Provided
Platform: Not Provided
Compiler: Not Provided

2

@couet can you help here?

3

Change the value of TGaxis::SetMaxDigits();
For instance:

TGaxis::SetMaxDigits(1);
4

I’m sorry, I just saw it. Thank you. I tried it, but there was an error in the code. I want to use it this way in graph,
image

but it is not allowed. A friend on forum suggested I try running the following code on root6 that is g1->GetHistogram()->GetYaxis()->SetMaxDigits(1);
but I can’t use root6 in my current environment.
I use root 5.34,an old version.
Thank you very much!

5

For the older versions use the global setting:

TGaxis::SetMaxDigits(1);
6

I am sorry that I did not achieve the purpose. After setting, the figure below,

image
image.png807×504 3.82 KB
and the horizontal coordinate of the figure has changed at the same time.Thank you very much!

7

I use:

{
   auto g = new TGraph();
   g->SetPoint(0,1,10000000);
   g->SetPoint(1,9,20000000);
   g->Draw("A*");
}

An i get:

25
Screenshot 2019-07-03 at 10.43.25.jpg1236×854 56.2 KB

The power of 10 is always a multiple of 3.