/***************************************************************************** 
  * Project: RooFit                                                           * 
  *                                                                           * 
  * Copyright (c) 2000-2005, Regents of the University of California          * 
  *                          and Stanford University. All rights reserved.    * 
  *                                                                           * 
  * Redistribution and use in source and binary forms,                        * 
  * with or without modification, are permitted according to the terms        * 
  * listed in LICENSE (http://roofit.sourceforge.net/license.txt)             * 
  *****************************************************************************/ 

 // -- CLASS DESCRIPTION [PDF] -- 
 // Your description goes here... 

 #include "Riostream.h" 

 #include "RooMyPdf.h" 
 #include "RooAbsReal.h" 
 #include "RooAbsCategory.h" 

 ClassImp(RooMyPdf) 

 RooMyPdf::RooMyPdf(const char *name, const char *title, 
		    RooAbsReal& _x,
		    RooAbsReal& _alpha) :
   RooAbsPdf(name,title), 
   x("x","x",this,_x),
   alpha("alpha","alpha",this,_alpha)
 { 
 } 


 RooMyPdf::RooMyPdf(const RooMyPdf& other, const char* name) :  
   RooAbsPdf(other,name), 
   x("x",this,other.x),
   alpha("alpha",this,other.alpha)
 { 
 } 



 Double_t RooMyPdf::evaluate() const 
 { 
   // ENTER EXPRESSION IN TERMS OF VARIABLE ARGUMENTS HERE 
   return x == 0 ? 1 : pow(sin(-alpha*x)/x,2);
 }