eval3d

values of a function on a grid

Calling Sequence

[z]=eval3d(fun,x,[y])

Arguments

:fun function accepting vectors as arguments. : :x,y 2 vectors of size (1,n1) and (1,n2). (default value for y :

y=x).

: :z matrix of size (n1,n2). :

Description

This function returns a matrix z(n1,n2). z(i,j)=fun(x(i),y(j)). If the function fun does not accept arguments of type vector use the primitive feval.

Sample

Examples

x=-5:5;y=x;
`deff`_('[z]=f(x,y)',['z= x.*y']);
z=eval3d(f,x,y);
`plot3d`_(x,y,z);

`deff`_('[z]=f(x,y)',['z= x*y']);
z=`feval`_(x,y,f);
`plot3d`_(x,y,z);

See Also

• feval multiple evaluation