Please, help me! :(

Newbie
1

Hello, Rooter.

1mgkk
1mgkk.jpg1674×1012 124 KB

I have gaussian fitting histogram. (red line)
However, I want to fit the histogram around the blue line.
I also want to know the function used for fitting.

Please help…!

2

Hi,
your data seem to have (at least) 2 gaussian compents.
The following may give you a hint how to treat that case:

#include "TH1.h"
#include "TF1.h"

void double_gauss()
{
	auto h1 = new TH1F("h1", "2 gauss", 80, -0.5, 0.5);
	auto f1 = new TF1("g2", "gaus(0) + gaus(3)", -0.5, 0.5);
	f1->SetParameters(20, 0, 0.1, 80, 0, 0.01);
	h1->FillRandom("g2", 3000);
	h1->Draw();
	h1->Fit("g2");
}

Cheers
Otto