Documentation of objone1

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Function Synopsis

ObjVal = objone1(Chrom, option);

Help text

 OBJective function for ONEmax function 1

 This function implements the ONEMAX function 1.

 Syntax:  [ObjVal, Nind, Nvar] = objone1(Chrom, option)

 Input parameters:
    Chrom     - Matrix containing the chromosomes of the current
                population. Each row corresponds to one individual's
                string representation.
                if Chrom == [], then special values will be returned
    option    - if Chrom == [] and
                option == 1 (or []) return boundaries
                option == 2 return title
                option == 3 return value of global minimum

 Output parameters:
    ObjVal    - Column vector containing the objective values of the
                individuals in the current population.
                if called with Chrom == [], then ObjVal contains
                option == 1, matrix with the boundaries of the function
                option == 2, text for the title of the graphic output
                option == 3, value of global minimum
                
 See also: objfun1

Cross-Reference Information

Listing of function objone1

% Author:   Hartmut Pohlheim
% History:  23.05.95    file created


function ObjVal = objone1(Chrom, option);

% Compute population parameters
   [Nind, Nvar] = size(Chrom);

% Check size of Chrom and do the appropriate thing
   % if Chrom is [], then define size of boundary-matrix and values
   if Nind == 0
      % Default dimension of objective function
      Dim = 100;
      % return text of title for graphic output
      if option == 2
         ObjVal = ['ONEMAX function 1'];
      % return value of global minimum
      elseif option == 3
         ObjVal = -Dim;
      % define size of boundary-matrix and values
      else   
         % lower and upper bound, identical for all n variables        
         ObjVal = repmat([0; 1], [1 Dim]);
      end
   % compute values of function
   else
      % function ONEMAX 1, sum of xi == 1 for i = 1:Nvar (Nvar = 100)
      % n = Nvar, xi in [0, 1] (binary)
      % global minimum at (xi) = (1) ; fmin = Nvar
      ObjVal = -sum((Chrom)')';
   end   


% End of function