Re: "[ROOT] how to shade one side of a graph"

From: Rene Brun (Rene.Brun@cern.ch)
Date: Tue Aug 06 2002 - 13:52:15 MEST


It looks like you have an obsolete version of ghostview, gv, gs.
I have no problems with postscript with this example.

Rene Brun

On Tue, 6 Aug 2002, Subhendu Chakrabarti wrote:

> 
> Thanks. This works nicely .But If I want to save it in a postscript file
> by adding
> c1->Print("new.ps"); to the macro ,shaded region disappears,graph prints.
>                
>         Subhendu Chakrabarti   
> 
>                 
> 
> On Tue, 6 Aug 2002, Rene Brun wrote:
> 
> > Hi,
> > 
> > Here is an example
> > 
> > void fillg() {
> >    const Int_t n = 8;
> >    Double_t x[n] = {87,100,110,120,130,150,160,200};   
> >    Double_t y[n] = {1e-6,2e-6,2.5e-6,3e-6,3e-2,2e-1,3e-1,7e-1};
> >    Double_t xmin = 80, ymin = 1e-6, xmax = 200, ymax = 1;
> >    
> >    TGraph *g = new TGraph(n,x,y);
> >    
> >    TCanvas *c1 = new TCanvas("c1");
> >    c1->SetLogy();
> >    c1->DrawFrame(xmin,ymin,xmax,ymax);
> >    g->SetLineColor(2);
> >    g->Draw("l");
> > 
> >    //make a new graph using the previous graph points
> >    //+ the corner points of the pad.
> >    TGraph *gabove = new TGraph(n+3);
> >    for (Int_t i=0;i<n;i++) gabove->SetPoint(i,x[i],y[i]);
> >    gabove->SetPoint(n,xmax,ymax);
> >    gabove->SetPoint(n+1,xmin,ymax);
> >    gabove->SetPoint(n+2,xmin,ymin);
> >    gabove->SetFillColor(4);
> >    gabove->SetFillStyle(3012);
> >    gabove->Draw("f");
> > }
> >    
> >    
> > Rene Brun
> > 
> > On Tue, 6 Aug 2002, Subhendu Chakrabarti wrote:
> > 
> > > 
> > > Hi
> > > 	I want to give a dark shade on the upper side of the graph
> > > only .(see  attachment)
> > > 
> > > Can anybody give some idea how to do that ?
> > > 
> > > Thanks in advance .
> > >                
> > >         Subhendu Chakrabarti   
> > > 
> > >                 
> > > 
> > 
> 



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