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//This code creates 5 histograms, two seperate histograms using input object (helicity, etc.) and input variable(fadc_a)(h0, h1), one for the subtraction of these 2 (h2), one for addition of the two (h3), then final one divividing them (h4).
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void hsad() {
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// Creates 2 histograms
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TH1F* h0 = new TH1F("h0", "fadc_a, h0", 1000, 0, 25000); //Adjust "fadc_a" to any variable in tree
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TH1F* h1 = new TH1F("h1", "fadc_a, h1", 1000, 0, 25000);
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// Fills histograms with different helicity (can also test differences in objects other than helicity)
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T->Draw("fadc_a>>h0", "helicity==0");
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T->Draw("fadc_a>>h1", "helicity==1");
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// Subtracts h0 - h1 and writes to new histogram "h2"
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TH1F* h2 = (TH1F*)h0->Clone("h2");
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h2->Add(h1, -1);
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// Reinitializes h0
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h0->Reset();
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T->Draw("fadc_a>>h0", "helicity==0");
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// Adds h0 + h1 and fills new histogram "h3"
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TH1F* h3 = (TH1F*)h0->Clone("h3");
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h3->SetName("fadc_a, +");
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h3->SetTitle("fadc_a, +;x-axis;y-axis"); //OPTIONAL- set name and axis for addition histogram
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h3->Add(h1, 1);
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// Divides h2 / h3 and fills new histogram "h4"
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TH1F* h4 = (TH1F*)h2->Clone("h4");
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h4->SetName("fadc_a"); //Var
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h4->SetTitle("fadc_a;x-axis;y-axis"); //Set name of final histogram and set x and y axis names
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h4->Divide(h3);
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// Reinitializes h0 and h2
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h0->Reset();
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T->Draw("fadc_a>>h0", "helicity==0");
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h2->Reset();
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h2->Add(h1, -1);
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h2->SetName("fadc_a, -");
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h2->SetTitle("fadc_a, -;x-axis;y-axis"); //OPTIONAL- set name and axis for subtraction histogram
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h0->Reset();
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T->Draw("fadc_a>>h0", "helicity==0");
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//gPad->SetLogx();
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// Draw final result
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h4->Draw(); //Change "h4" to desired histogram
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}
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