How to set the variables as integers in a Genetic Algorithm Function?

Hi,

Supposing the objective function is @(x)f(x(1),x(2)). I would like to set the variable 'x' as a integer in a Genetic Algorithm Function.

How should I do? Is there anyone knowing it?

Thanks, Zheng

Answer 1

[Walter Roberson]

http://www.mathworks.com/help/gads/mixed-integer-optimization.html

Note that there are a number of restrictions on ga()'s operation when you constrain to integer.

[Zheng]

Thanks, Walter.

But after I set IntCon as [1 2] and run the function, I've got this message. "Tenth input argument must be a valid structure created with GAOPTIMSET."

The function I wrote was "nvars=2; IntCon=[1 2]; [x,fval]=ga(Obj,nvars,[],[],[],[],LB,UB,[],IntCon);"

[Walter Roberson]

Which MATLAB version are you using?

[Zheng]

R2010b

[Walter Roberson]

It appears R2010b did not support IntCon http://www.mathworks.com/help/releases/R2010b/toolbox/gads/ga.html

It appears it was introduced in R2011b

[Zheng]

Thanks, Walter.

[Walter Roberson]

Do not keep re-asking the same Question -- especially without providing the crucial information that you need to do the work in a release before IntCon was introduced!

If you wanted to ask how you could proceed in R2010b anyhow, then just ask that. The answer would be:

http://www.mathworks.com/matlabcentral/newsreader/view_thread/136256

http://www.mathworks.com/support/solutions/en/data/1-10PDHC/index.html?product=GD&solution=1-10PDHC

[Zheng]

This example really helps. Cheers

[Pratik Anandpara]

how to set it in ga boundry value only in integer lb=[100 1] ub=[500 50]

i want upper and lower boundry value only in integer not in decimal point

[Walter Roberson]

Is the general form

x = ga(fitnessfcn,nvars,A,b,[],[],LB,UB,nonlcon,IntCon)

not what you need?