Cellfunc

I am trying to create a function from R^n to R^n such that I can evaluate that function and eventually compute the gradient. Here is what i wrote (a modification of one of the post): f1=@(x_1,x_2) (x_1-2)^2+x_2;

f2=@(x_1,x_2) sqrt(x_2-1);

ff = {f1; f2};

F = @(x) cellfun(@feval,ff(:),num2cell(x(:)));

F([2 2]) But I am getting the following error: ??? Input argument "x_2" is undefined. Error in ==> @(x_1,x_2)(x_1-2)^2+x_2

Error in ==> @(x)cellfun(@feval,ff(:),num2cell(x(:)))

What am I doing wrong?

Thanks for your help in advance!

Answer 1

[Andrei Bobrov]

f1=@(x_1,x_2) (x_1-2)^2+x_2;

f2=@(x_1,x_2) sqrt(x_2-1);

ff = {f1; f2};

x = [5 7];

F = @(x)cellfun(@(x,y)x(y{:}),ff,repmat({num2cell(x)},2,1));

F(x)

[Eddy]

Thanks a lot!!!!!!!!!

I work perfectly.

Answer 2

[Eddy]

Thanks a lot!!!!!!!!! It works perfectly.