A fitting issue

[Kblm]

void test()
{
    TFile *IFile = new TFile("/mnt/c/Users/mn/root/inte012013.root");
    TH1F *det1 = (TH1F *)IFile->Get("det1");

    float X[100], Y[100];
    int N(0);

    for(int n(10); n < 74; n++)
    {
        X[N] = det1->GetBinCenter(n);
        Y[N] = det1->GetBinContent(n);
        N++;
    }

    TF1 *f = new TF1("f", "pol1", 0, 2);
    TGraph *g = new TGraph(N, X, Y);
    g->SetMarkerStyle(20);
    g->Draw("AP");
    g->Fit(f, "R");

 // Now, to save the TGraph and the fit function to a new ROOT file
    TFile *outputFile = new TFile("/mnt/c/Users/mn/root/output.root", "RECREATE");
    g->Write("graph");
    f->Write("fitFunction");

    // Close the files
    outputFile->Close();
    IFile->Close();
}

Fit is disappearing when changing scale in tbrowser

[couet]

Welcome to the root forum.

We cannot try your macro because we do not have the data file.

Does it work if you the output part at the end ?

[Kblm]

No it doesn’t work

[couet]

[can you provide inte012013.root ?

[Kblm]

Says new user can’t upload link

[Kblm]

Any other way I can share?

[couet]

No need , I created a simple graph. The following macro is ok:

{
    float X[100], Y[100];
    int N(0);

    for(int n(10); n < 74; n++)
    {
        X[N] = n;
        Y[N] = 2.*n;
        N++;
    }

    TF1 *f = new TF1("f", "pol1", 0, 2);
    TGraph *g = new TGraph(N, X, Y);
    g->SetMarkerStyle(20);
    g->Fit(f);
    g->Draw("AP");
}

[Kblm]

this worked. Thank you.
I have one more query but not able to upload script and also it has more character than allowed how should i share?

[couet]

You are not allowed to attached the file ?

[Kblm]

Issue sorted, Thank you