how can I call a function which get the answers numberically

Hi,dear all

I have wrote a code for calculating the optimization problem numerically. Now I need to call it in another problem. How can I do this? Because it is not a simple function but contains a lot of if...for... sentences, I don't know what to do.

The gist of the problem is maximizing the dependent variable y through two independent variables x1,x2 for different parameters. But I can't give explicit expression of the function like y=x^2+x or something, so I use fmincon to do the optimization.And it also involves some if...and for sentences because of requirement of the problem. Now I need to call this problem in a another program just like to call a function like y=x^2+x.

I am pretty new to Matlab so my questions may seem quite stupid. But I would appreciate a lot if you can give me some advice:)

Answer 1

[John Petersen]

You didn't give much info on your problem but I assume you just want the form of a function. Here's a simple example.

function    [y1,y2,y3] = yourfunction(x1,x2,x3)

y1 = x1+x2+x3;
y2 = x1-x2;
y3 = x2+x3;

That's all there is too it! Did that answer your question?

[xueqi]

Hi Thanks! But my problem is little more complicated. I don't have the explicit expression of the function y=f(x) but only can get the relation of f and x numerically... And thanks for your advice I will edit my question to make it more clear:)

[Image Analyst]

It doesn't matter. Just take the input arguments, do whatever you want with them to create output arguments, and pass the output arguments back to the main function. So in your main function, you'd have this

[y1 y2 y3] = yourfunction(x1, x2, x3);

[xueqi]

Yes it works!!Thanks:)