Evaluate a 3D Chebyshev series on the Cartesian product of x, y, and z.
This function returns the values:
where the points (a, b, c) consist of all triples formed by taking a from x, b from y, and c from z. The resulting points form a grid with x in the first dimension, y in the second, and z in the third.
The parameters x, y, and z are converted to arrays only if they are tuples or a lists, otherwise they are treated as a scalars. In either case, either x, y, and z or their elements must support multiplication and addition both with themselves and with the elements of c.
If c has fewer than three dimensions, ones are implicitly appended to its shape to make it 3D. The shape of the result will be c.shape[3:] + x.shape + y.shape + z.shape.
Parameters :  x, y, z : array_like, compatible objects
c : array_like


Returns :  values : ndarray, compatible object

See also
Notes