Re: regarding fitting of curve

Here is a small example. I guess it answers your two questions.

Cheers, O.Couet

{

   c1 = new TCanvas("c1","A Simple Graph Example",200,10,700,500);                                                                                 

   c1->SetGrid();                                                                                 

   const Int_t n = 20;
   Double_t x[n], y[n];
   for (Int_t i=0;i<n;i++) {

     x[i] = i*0.1;
     y[i] = 10*sin(x[i]+0.2);
   }
                                                                                

   gr = new TGraph(n,x,y);

   gr->SetLineColor(2);
   gr->SetLineWidth(4);
   gr->SetMarkerColor(4);
   gr->SetMarkerStyle(21);
   gr->SetTitle("a simple graph");
   gr->Draw("ACP");
                                                                                

   TLegend *legend=new TLegend(0.5,0.5,0.7,0.7);

   legend->SetTextFont(72);
   legend->SetTextSize(0.04);
   legend->AddEntry(gr,"Graph","lp");
   legend->Draw();
   legend->SetFillStyle(0);
   legend->SetBorderSize(0);

On Thu, 12 May 2005, Sushil Singh Chauhan wrote:

> Dear sir,
> I am plotting some plots using root. I fist plot the data point and
> then fit that using the option provided in the root.Finally the fitting
> is shown by the lines. But I am facing some problem which are:
>
> 1) I am not able to put the same line in the legend box. As I am
> plotting the two or more sets on the same plot so to distinguishe them i
> need to put there corrosponding line(after fitting) style in the legend
> box. I do not know how to do it. I saw the root mannual but I have not
> found anything regarding this.
> Is there any other way to do it?
> 2) How can I remove the boundry of the legend box. I mean I do not want
> to show the box in the plots.
>
> with best regards,
> sushil.
>

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