Using a variable from a loop when saving a histogram

Newbie
1

Hello, everyone.

I have the following situation:

A for loop where I vary a certain variable which contains another loop where I fill the histogram. Then I would like to store the histogram (by means of SaveAs). As I will have many of these histograms due to a variation of the parameter in my first loop, I wanted to add the value of the this variable in the name to be saved. How does one do this?

for (Int_t a = 0; a <11; a ++ ){
for (){
//Here the  histogram is being filled.
}
//Saving the histogram containing the current value of a.
}

_ROOT Version: 6.26/02
_Platform: Ubuntu 22.04.1 LTS
_Compiler: 11.2.0

2

“SaveAs” what (e.g., a “.root” file, a “.C++” macro file)?
“name to be saved” of what (the histogram itself or the file)?

3

You need to define the name (of whatever) using Form().
There are many examples on this forum.

4

Hello, Wile_E_Coyte.

I would like to save my histogram as png, so something of the form:

c1->SaveAs("InvMass.png");

With kind regards,
Ramin

5

Hello,

Thank you very much. I will take a look.

With kind regards,
Ramin

6

c1->SaveAs(Form("InvMass.%d.png", a));

7

Hello, Wile_E_Coyte.

That worked like a charm. Thank you very much.

With kind regards,
Ramin