 Usage:  x = nelmin (x0, f, maxiter {,eps , step})  
 
 Input:

  x0                     p x n matrix with n starting vectors 
                         
  f                      text, name of the procedure where the function is defined 
                         
  maxiter                integer, maximal number of iterations 
                         
  eps                    scalar 
                         
  step                   scalar, lenght of initial simplex 
                         
 Output:

  x.minimum              p x n matrix with the n minima 
                         
  x.iter                 number of iterations 
                         
  x.converged            1 if the algorithm has converged with every starting vector and 0 if it has not 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
