Bool_t interp1spline(UInt_t,UInt_t, Double_t*, Double_t*, Double_t*, Double_t*);
Double_t Mobility(Int_t,Double_t,Double_t);
void fcn(int& , double*, double& , double* ,int);

void calculateEfield(UInt_t, Double_t*, Double_t*, UInt_t, Double_t, Double_t,    
Double_t*, Double_t*, Double_t*, Double_t, Double_t, Double_t, UInt_t,
UInt_t, Double_t*,Double_t , Double_t,
Double_t ,Double_t);