Not enough input arguments

Please refer to the following link http://in.mathworks.com/help/gads/examples/coding-and-minimizing-a-fitness-function-using-the-genetic-algorithm.html

I simply did copy and paste of the program given in the following link as below. But it is showed an error "Not enough input arguments'

 function y = simple_fitness(x)
y = 100 * (x(1)^2 - x(2)) ^2 + (1 - x(1))^2
FitnessFunction = @simple_fitness
numberOfVariables = 2
[x,fval] = ga(FitnessFunction,numberOfVariables)

What is the mistake which I am doing ?

[Binay Chandra]

You have to separate out the simple_fitness function and genetic algorithm script. Just create the function

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function y = simple_fitness(x)

y = 100 * (x(1)^2 - x(2)) ^2 + (1 - x(1))^2;

end

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and execute the genetic algorithm scripts at the command window.

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FitnessFunction = @simple_fitness;

numberOfVariables = 2;

[x,fval] = ga(FitnessFunction,numberOfVariables)

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[Rakesh Jain]

Instead of running in a command window, can I make a separate file of it and then run it?

[Walter Roberson]

Yes, you need to put functions into files; you cannot use the "function" keyword at the command line.