 Usage:  VaRdiagplot(int,sig,real,g)  
 
 Input:

  int                    mx2 matrix containing intervals in the rows. 
                         
  sig                    nx1 vector of predicted standard deviations 
                         (assume normality) 
                         
  real                   nx1 vector of realizations. 
                         
  g                      scalar, number of grid points. 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
