numpy.ma.make_mask

numpy.ma.make_mask(m, copy=False, shrink=True, flag=None, dtype=<type 'numpy.bool_'>)

Return m as a mask, creating a copy if necessary or requested.

The function can accept any sequence of integers or nomask. Does not check that contents must be 0s and 1s.

Parameters:

m : array_like

Potential mask.

copy : bool

Whether to return a copy of m (True) or m itself (False).

shrink : bool

Whether to shrink m to nomask if all its values are False.

dtype : dtype

Data-type of the output mask. By default, the output mask has a dtype of MaskType (bool). If the dtype is flexible, each field has a boolean dtype.