Hello to everyone!
I have fitted two data sets in a graph and all I want is to print the parameters in the legend.
I used ->Print(“all”), however it prints only in terminal.
I also used ->GetParameters(), but again nothing happens.
Any ideas?
P.S.:The code I am using is:
[code]# include “TCanvas.h”
include “TROOT.h”
include “TGraphErrors.h”
include “TF1.h”
include “TLegend.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]={560,565,570,575,580,585,590,595,600,605,610,615,620,625,630,635,640,645,650,655};
double y_Fe[n_Fe]={1056,1200,1392,1584,1824,2064,2304,2688,3024,3456,3984,4512,5088,5856,6624,7488,8640,9792,11280,12624};
double errorY_Fe[n_Fe];
for (int i=0; i<n_Fe; i++){
errorY_Fe[i]=192;
}
const int n_alpha=9;
double x_alpha[n_alpha]={500,535,540,545,550,555,560,565,570};
double y_alpha[n_alpha]={220,490,556,622,710,754,849,959,1098};
double errorY_alpha[n_alpha];
for (int i=0; i<n_alpha; i++){
errorY_alpha[i]=30;
}
gROOT->SetStyle("Plain");
TGraphErrors * gr1 = new TGraphErrors( n_Fe, x_Fe, y_Fe, NULL, errorY_Fe );
gr1->SetName(“gr1”);
gr1->SetTitle(“Fe”);
gr1->SetMarkerStyle(20);
gr1->SetMarkerColor(4);
gr1->SetDrawOption(“AP”);
gr1->SetLineColor(4);
gr1->SetLineWidth(1);
gr1->SetFillStyle(0);
TGraphErrors * gr2 = new TGraphErrors( n_alpha, x_alpha, y_alpha, NULL, errorY_alpha);
gr2->SetName(“gr2”);
gr2->SetTitle(“alpha”);
gr2->SetMarkerStyle(20);
gr2->SetMarkerColor(2);
gr2->SetDrawOption(“P”);
gr2->SetLineColor(2);
gr2->SetLineWidth(1);
gr2->SetFillStyle(0);
gr1->Fit(“expo”);
gr1->GetFunction(“expo”)->SetLineColor(4);
gr1->GetFunction(“expo”)->SetLineWidth(2);
gr1->Print(“all”);
gr2->Fit(“expo”);
gr2->GetFunction(“expo”)->SetLineColor(2);
gr2->GetFunction(“expo”)->SetLineWidth(2);
mg->Add(gr1);
mg->Add(gr2);
mg->Draw(“AP”);
mg->SetTitle(“Gain Curve for Fe X-rays and Po-210 alpha particles;Vmesh[V];Gain”);
mycanvas->BuildLegend(0.15, 0.7, 0.4, 0.9,“Ar-CO2–>70%-30%”);
mycanvas->SetLogy(1);
mycanvas->Print(“graph_with_law.pdf”);
}
[/code]
{I am joking!}