Evaluate the estimated pdf on a set of points.

Parameters :

points : (# of dimensions, # of points)-array

Alternatively, a (# of dimensions,) vector can be passed in and treated as a single point.

Returns :

values : (# of points,)-array

The values at each point.

Raises :

ValueError : if the dimensionality of the input points is different than

the dimensionality of the KDE.