54    RhoR(
SimInfo* info, 
const std::string& filename, 
const std::string& sele,
 
   55         RealType len, 
int nrbins, RealType particleR);
 
   57    int getNRBins() { 
return nRBins_; }
 
   59    RealType getLength() { 
return len_; }
 
   61    virtual void process();
 
   64    void processHistogram();
 
   71    std::string selectionScript_;
 
   80    std::vector<int> histogram_;
 
   81    std::vector<RealType> avgRhoR_;