eval3d - values of a function on a grid

Calling Sequence

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

Parameters

• 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 doesn't accept arguments of type vector use the primitive feval.

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  

Author

Steer S.; ; ;