sample : array_like
Data to histogram passed as a sequence of D arrays of length N, or
as an (N,D) array.
bins : sequence or int, optional
The bin specification:
- A sequence of arrays describing the bin edges along each dimension.
- The number of bins for each dimension (nx, ny, ... =bins)
- The number of bins for all dimensions (nx=ny=...=bins).
range : sequence, optional
A sequence of lower and upper bin edges to be used if the edges are
not given explicitely in bins. Defaults to the minimum and maximum
values along each dimension.
normed : boolean, optional
If False, returns the number of samples in each bin. If True, returns
the bin density, ie, the bin count divided by the bin hypervolume.
weights : array_like (N,), optional
An array of values w_i weighing each sample (x_i, y_i, z_i, ...).
Weights are normalized to 1 if normed is True. If normed is False, the
values of the returned histogram are equal to the sum of the weights
belonging to the samples falling into each bin.