Fmincon

Hi,

I would like to minimise a scaler (a in the example below) using fmincon , the minimised value is then used to calculate new values of x1,x2. The new values of x1, and x2 must satisfy a non linear equation. The process would look like this.

f(x1,x2); xi+1 = xi+a*s1 set initial values of x1,x2 using initial values of x1,x2-mimimise f(a) subject to new values of x1,x2 satisfying nonlcon

Here is code I have but this doesn't have nonlcon yet, it just finds the minimimum

        xtmp = @(n,a) storextmp(n) + searchtmp(n)*a;

 functmp = @(a)121.126*xtmp(1,a)^2*xtmp(2,a)+748.812*xtmp(1,a)*xtmp(2,a)+234.323*xtmp(2,a);

        a = fminsearch(functmp, 0);

        dx1 = a*searchtmp;
        xnew = storextmp + dx1; 
        fnew = feval(func, xnew);

Is this possible?