Pdf Struct Reference

Inheritance diagram for Pdf:

Public Member Functions
	Pdf (IRandom::pointer rng, const std::vector< double > &pdf, const std::vector< double > &edges)
double	operator() ()

Public Attributes
IRandom::pointer	rng
std::vector< double >	cumulative
std::vector< double >	edges
double	total

Detailed Description

Definition at line 86 of file BlipSource.cxx.

Constructor & Destructor Documentation

Pdf::Pdf ( IRandom::pointer  rng, const std::vector< double > &  pdf, const std::vector< double > &  edges  )

inline

Definition at line 91 of file BlipSource.cxx.

        : rng(rng), edges(edges.begin(), edges.end()) {
        total = 0.0;
        cumulative.push_back(0.0);
        for (double val : pdf) {
            total += val;
            cumulative.push_back(total);
        }
    }

Member Function Documentation

double Pdf::operator() ( void  )

inline

Definition at line 100 of file BlipSource.cxx.

                        {
        double cp = rng->uniform(0.0, total);
        for (size_t ind=1; ind<cumulative.size(); ++ind) { // start at 2nd element
            if (cumulative[ind] >= cp) {
                double rel = (cp - cumulative[ind-1]) / (cumulative[ind]-cumulative[ind-1]);
                return edges[ind-1] + rel*(edges[ind] - edges[ind-1]);
            }
        }
        return -1;              // should not happen
    }

Member Data Documentation

std::vector<double> Pdf::cumulative

Definition at line 88 of file BlipSource.cxx.

std::vector<double> Pdf::edges

Definition at line 89 of file BlipSource.cxx.

IRandom::pointer Pdf::rng

Definition at line 87 of file BlipSource.cxx.

double Pdf::total

Definition at line 90 of file BlipSource.cxx.

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

• wire-cell-build/gen/src/BlipSource.cxx