CaloWeightInterpolator Struct Reference

calculates an interpolated weight in n dimensions More...

#include <CaloWeightInterpolator.h>

Collaboration diagram for CaloWeightInterpolator:

Static Public Member Functions
static double	getWeight (std::vector< double > &w, std::vector< double > &x)

Detailed Description

calculates an interpolated weight in n dimensions

Version

$Id: CaloWeightInterpolator.h,v 1.0 2009-06-12 09:09:14 gunal Exp $

Author

Sven Menke menke.nosp@m.@mpp.nosp@m.mu.mp.nosp@m.g.de

Date

12-June-2009

helper struct to interpolate the 2^n weights w in n-dimensions by 2^n-1 successive linear interpolations. The order of the vector w is by dimension - i.e. the first dimension changes in every element of w, the second every 2, the 3rd every 4, and so on. The vector x is supposed to carry the n relative positions within the current bin.

Definition at line 25 of file CaloWeightInterpolator.h.

Member Function Documentation

getWeight()

double CaloWeightInterpolator::getWeight ( std::vector< double > & w, std::vector< double > & x )

static

Definition at line 26 of file CaloWeightInterpolator.cxx.

                                            {
  // check input
  if ( w.size() > 1 ) {
    if ( w.size() != (unsigned long)(1<<x.size()) ) {
      std::cerr << "CaloWeightInterpolator::getWeight(): vectors have wrong dimension"
        << std::endl;
      return 0;
    }
    if ( x[0] < 0 || x[0] > 1 ) {
      std::cerr << "CaloWeightInterpolator::getWeight(): coordinate " << x[0] 
        << " out of allowed range [0,1]"
        << std::endl;
      return 0;
    }
    std::vector<double> w1(w.size()>>1);
    std::vector<double> x1(x.size()-1);
    std::copy(x.begin()+1,x.end(),x1.begin());
    for(unsigned int i=0;i<w1.size();i++) {
      w1[i] = w[2*i]+x[0]*(w[2*i+1]-w[2*i]);
    }
    return getWeight(w1,x1);
  }
  else return w[0];
}

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The documentation for this struct was generated from the following files:

• CaloWeightInterpolator.h
• CaloWeightInterpolator.cxx