eval3d — values of a function on a grid
[z]=eval3d(fun,x,[y])
function accepting vectors as arguments.
2 vectors of size (1,n1) and (1,n2). (default value for y
: y=x
).
matrix of size (n1,n2).
This function returns a matrix z(n1,n2)
. z(i,j)=fun(x(i),y(j))
.
If the function fun
doesn't accept arguments of type vector use the
primitive feval
.