complaining about it. Introduced a dummy Draw(Option_t*) to avoid warning.
//fixed y
// void DrawY(Float_t y1, Float_t y2,Float_t x);
//draw one dimensional response for fixed x
+ void Draw(Option_t *) {}
void Draw(Float_t x1, Float_t x2, Float_t y1, Float_t y2,
Bool_t inter=kFALSE, Int_t Nx=20, Int_t Ny=20);
//draw two dimensional PRF
//return pad width
Float_t GetSigma(){return fSigma;}
//return estimated sigma of RF
+ void Draw(Option_t*) {}
void Draw(Float_t x1=-3 ,Float_t x2 =3.,Int_t N = 200);
//draw RF it don't delete histograms after drawing
/// it's on user !!!!