Linear fit

[Pepe_Le_Pew]

Print in Graph Legend fit parameters

[code]# include “TCanvas.h” include “TROOT.h” include “TStyle.h” include “TMultiGraph.h” include “TGraphErrors.h” include “TF1.h” include “TLegend.h” include “TPaveStats.h” include “TArrow.h” include “TLatex.h” void gain(){ TCanvas *mycanvas = new TCanvas(“c”,“c”,600, 400); TMultiGraph * mg = new TMultiGraph(“gain curve”,“GAIN CURVE”); // The values on the X,Y axes and error on Y axis const int n_Fe=20; double x_Fe[n_Fe]={560,565,570,575,580,585,590,595,600,605,610,615,620,625,630,635,640,…

How to move statistics box when using Draw("sames"

// http://root.cern.ch/root/html/TStyle.html#TStyle:SetOptStat gStyle->SetOptStat(1111); // ... // http://root.cern.ch/root/html/TH1.html#TH1:SetStats // SomeHisto->SetStats(kTRUE); // ... // http://root.cern.ch/root/html/THistPainter.html SomeHisto->Draw("SAMES"); // you MUST draw "SomeHisto" first (e.g. with "SAMES") gPad->Modified(); gPad->Update(); // make sure it's really (re)drawn // http://root.cern.ch/root/html/TPaveStats.html #if 1 /* 0 or 1 */ TPaveStats *s = ((TPaveStats*)(SomeHisto->F…

TH2 Custom Stats?

Note “h->SetStats(kFALSE); // mandatory (not sure why)”: [code]{ gStyle->SetOptStat(); // mandatory TCanvas *c = new TCanvas(“c”, “c”, 600, 400); TH2F h = new TH2F(“h”, "TH2F example ", 30, -4, 4, 30, -20, 20); Float_t px, py; for (Int_t i = 0; i < 25000; i++) { gRandom->Rannor(px, py); h->Fill(px-1, 5py); h->Fill(2+0.5px, 2py-10., 0.1); } h->SetStats(kTRUE); h->Draw(“COLZ”); gPad->Modified(); gPad->Update(); // mandatory TPaveStats ps = (TPaveStats)gPad->GetPrimitive(“stats”); if …

Adding fit parameters into statistical box

[code] gStyle->SetOptFit(1); h_ccd_CTE_L->SetOption(“p”); TF1 *pol1_LCCD = new TF1(“pol1”,“pol1”,lower_x_hist_cte,upper_x_hist_cte); h_ccd_CTE_L->Fit(pol1_LCCD,“R”); gPad->Modified(); gPad->Update(); // make sure it’s (re)drawn // https://root.cern.ch/root/html/TPaveStats.html TPaveStats st = (TPaveStats)h_ccd_CTE_L->FindObject(“stats”); st->SetX1NDC(0.7); st->SetX2NDC(0.99); st->SetY1NDC(0.2); st->SetY2NDC(0.5); st->SetName(“mystats”); h_ccd_CTE_L->SetStats(0); TList *list = st->G…