Construct a new contour generator for density estimates.
The generic refers to the data type of an element in the data array
used with the density contour generator. If omitted, the default setting assumes that,
the elements of the data array used with the density contour generator are two-element arrays.
The first element corresponds to the x-dimension, the second to the y-dimension.
Important: ensure that the x- and y-accessor functions are configured to
match the data type used for the generic Datum.
Construct a new contour generator for density estimates.
The generic refers to the data type of an element in the data array used with the density contour generator. If omitted, the default setting assumes that, the elements of the data array used with the density contour generator are two-element arrays. The first element corresponds to the x-dimension, the second to the y-dimension.
Important: ensure that the x- and y-accessor functions are configured to match the data type used for the generic Datum.