Plot a function of two variables?

I implemented a function of two variables in Matlab :

function X=mFunction(alpha,beta).

I want to see his graph for the alpha and beta values between 0 and 1. How should I proceed?

Thanks

Answer 1

[dpb]

See example at

doc meshgrid

[amine&&]

when I type the following commands:

[X,Y] = meshgrid(0:.2:1, 0:.2:1);
surf(X,Y,mFunction(X,Y))

matlab gives me the following error :

In an assignment  A(I) = B, the number of elements in B and I must be the same.
Error in mFunction (line 40)
    L(i)=alpha.*MS3(i)+(1-alpha).*L(i-1);

[dpb]

Your function isn't written correctly, then. Use the debugger to see what's the mismatch in dimensions; it's not totally apparent as one would presume i is a loop index and so is a single integer value; if MS3 is an array it would also be a single value but if it happened to be a function it could return something other than. Or alpha could be the culprit...

Whatever it is, it looks like the LHS is a single value whereas the RHS isn't. But, not enough context for us to tell for certain who's to blame but looks like alpha is the likely suspect.

[Walter Roberson]

You went ahead and created a new Question on this topic, and I gave the answer there.

http://www.mathworks.com/matlabcentral/answers/293579-error-code-in-an-assignment-a-i-b-the-number-of-elements-in-b-and-i-must-be-the-same

[amine&&]

Thanks Walter for your help!