TGraph with a free defined SetPalette

ROOT
1

Hi,

I want to plot a palette to a TGraph, which should
show the color of some TMarker. The Labels should
be set to zero – “highestValue”. Is such a palette possible?

Thanks a lot in advance!

ps: the file is on http://christoph.kendel.de/data.txt

#include <stdio>
#include <algorithm> // for max_element

void macro()
{

 FILE *input;
 input = fopen( "data.txt", "r");

 int x[1000], y[1000], z[1000];
 float a[1000], val[1000];

 int iMaxLines = 0;

 for (int i=0;i<840;i++)
 {
     fscanf( input, "%d %d %d %f %f\n",&(x[i]),&(y[i]), &(z[i]),
&(a[i]), &(val[i]) );
     iMaxLines++;
 }

 // calculates the Color-Scale
 float highestValue = *max_element(val,val+iMaxLines);
 Int_t colorsOfThePalette[50];
 for(int i = 0; i<50>SetPalette(50,colorsOfThePalette);

 // Plotting the TGraph with the TMarker
 TGraph *gr = new TGraph(iMaxLines,x,y);
 gr->Draw("AP");

 Double_t *nx = gr->GetX();
 Double_t *ny = gr->GetY();

 for(int j=0; j<iMaxLines>SetMarkerColor(myColor);
   m->Draw();
 }
}
 input = fopen( "data.txt", "r");

 int x[1000], y[1000], z[1000];
 float a[1000], val[1000];

 int iMaxLines = 0;

 for (int i=0;i<840;i++)
 {
     fscanf( input, "%d %d %d %f %f\n",&(x[i]),&(y[i]), &(z[i]),
&(a[i]), &(val[i]) );
     iMaxLines++;
 }

 // calculates the Color-Scale
 float highestValue = *max_element(val,val+iMaxLines);
 Int_t colorsOfThePalette[50];
 for(int i = 0; i<50>SetPalette(50,colorsOfThePalette);

 // Plotting the TGraph with the TMarker
 TGraph *gr = new TGraph(iMaxLines,x,y);
 gr->Draw("AP");

 Double_t *nx = gr->GetX();
 Double_t *ny = gr->GetY();

 for(int j=0; j<iMaxLines>SetMarkerColor(myColor);
   m->Draw();
 }
}
2

TPaletteAxis is the ROOT class managing palettes.
root.cern.ch/root/htmldoc/TPaletteAxis.html