Error: Inner matrix dimensions must agree.

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Hi, I am using "gamultiobj" to solve my problem. I, however, have no idea why the error message occurred
??? Error using ==> mtimes
Inner matrix dimensions must agree.
Error in ==> col_mop>@(x)x'*(B'*B)*x at 50
fun1 = @(x) x'*(B'*B)*x;
My objective function is coded as follows
fun1 = @(x) x'*(B'*B)*x;
fun2 = @(x) x'*x;
bifun = @(x) [fun1(x) fun2(x)];
The dimension of B'*B is m so x is an m-by-1 vector. The syntax for gamultiobj is
X = gamultiobj(FITNESSFCN,NVARS,A,b,Aeq,beq,LB,UB,options)
I have properly input the number of decision variables (NVARS) as m but the error message shows. I also check the dimensions using the command "whos" which showed what I wanted. Is there anything wrong?
Thanks in advance.

Accepted Answer

Paulo Silva
Paulo Silva on 15 Jun 2011
Chien-Chia Huang
Chien-Chia Huang on 16 Jun 2011
sorry Matt I did not see your reply. The output of size(B) was 5-by-10 and size(x) was 10-by-1. But the requested x in gamultiobj should be 1-by-10. Thanks, anyway. :D

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