UserCode/RootMacros/setIntegerBinLabels.C

// For histograms plotting discrete numbers (nJets, nHits, etc.), it makes 
// more sense to have discrete bin labels rather than letting ROOT set up
// an axis with intermediate values, tick marks, etc.

// This script will set integers as the bin labels, assigning startingValue
// to the first bin (which will usually be either 0 or 1).

void setIntegerBinLabels( TH1F* h, int startingValue = 0 ) 
{
  // Draw with graphics off to make sure X axis exists
  h->Draw("goff"); 
  int nBins = h->GetNbinsX();
  for ( int i = 0; i < nBins; i++ )
    h->GetXaxis()->SetBinLabel( i + 1, Form( "%i", i + startingValue ) ); 
}
Revision:	1.1
Committed:	Wed Mar 18 21:14:28 2009 UTC (16 years, 1 month ago) by klukas
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Log Message:	Give the x-axis bins integer labels; useful for nJets, nHits, etc.
#	Content
1	// For histograms plotting discrete numbers (nJets, nHits, etc.), it makes
2	// more sense to have discrete bin labels rather than letting ROOT set up
3	// an axis with intermediate values, tick marks, etc.
4
5	// This script will set integers as the bin labels, assigning startingValue
6	// to the first bin (which will usually be either 0 or 1).
7
8	void setIntegerBinLabels( TH1F* h, int startingValue = 0 )
9	{
10	// Draw with graphics off to make sure X axis exists
11	h->Draw("goff");
12	int nBins = h->GetNbinsX();
13	for ( int i = 0; i < nBins; i++ )
14	h->GetXaxis()->SetBinLabel( i + 1, Form( "%i", i + startingValue ) );
15	}