{
   auto c1 = new TCanvas("c1","Logarithm of intensity vs thickness of absorbator",200,10,700,500); //Making a canvas
   c1->GetFrame()->SetBorderSize(12);  //Setting a boardersize on the canvas

   const Int_t n = 6;
   Double_t x[n]  = {0, 0.36, 0.725, 1.155, 1.485, 1.895};   //Defining the vector for the thickness
   Double_t y[n]  = {6.603708239, 6.339128627, 6.036150736, 5.718231393, 5.456702047, 5.080461954};   //Definig the vector for the logarithm of the intensity
   Double_t ex[n] = {0, 0.005, 0.007071067812, 0.008660254038, 0.01, 0.01118033989};   //Defining the vector for the uncertainy of the thickness
   Double_t ey[n] = {0.004738504413, 0.004767208019, 0.004926464143, 0.005060277095, 0.005269866458, 0.005827806096}; //Definig the vector for the uncertainty of the logarithm of the intensity

   auto gr = new TGraphErrors(n,x,y,ex,ey);   //Making a graph that takes in the vectors as parameters
   gr->SetTitle("Logarithm of intensity vs thickness of absorber; Thickness x [cm]; Logarithm of intensity ln(I-I_B)");   //Setting the main title and the titles on the axis
   gr->GetXaxis()->CenterTitle(true);    //  Axis label in the center
   gr->GetYaxis()->CenterTitle(true);    //  Axis label in the center
   gr->SetMarkerStyle(1);   //Marker is a small dot
   gr->SetMarkerColor(1);   //Marker color is black
   gr->SetLineWidth(1);   //Setting the width of the line
   gr->SetLineColor(9);   //The line color is blue
   gr->Draw("APEL");   //Drawing the graph in the canvas with axis and a simple polyline between the points

}