Re: Draw("COL")

Rene Brun (Rene.Brun@cern.ch)
Thu, 26 Mar 1998 09:08:13 +0100

Xavier Bertou wrote:
>
> Hello,
>
> I'm using Draw("COL") and would like to be able to define my own levels
> just like histo->SetContour() does for Draw("CONT"). Is it possible ?
>
> Another thing : how can I define a palette with RGB components ? (cf
> "color" command with PAW).
>
> Thanx,
> Xavier Bertou

A small macro illustrating how to define a new color palette.

Rene Brun

{
gROOT->Reset();
TH2F hxy = new TH2F("hxy","test palette",40,-4,4,20,-4,4);
Float_t x,y;
for (Int_t i=0;i<1000;i++) {
gRandom->Rannor(x,y);
hxy->Fill(x,y);
}

// Create a new color palette with only 10 colors
Int_t colors[]={1,22,33,42,5,6,7,8,9,2};
gStyle->SetPalette(10,colors);
hxy->Draw("col");

// the default palette is given in the following table
// Int_t colors[50] = {19,18,17,16,15,14,13,12,11,20,
// 21,22,23,24,25,26,27,28,29,30, 8,
// 31,32,33,34,35,36,37,38,39,40, 9,
// 41,42,43,44,45,47,48,49,46,50, 2,
// 7, 6, 5, 4, 3, 112,1};
// gStyle->SetPalette(50,colors);
}