Oct. 28, 2011
6:22 a.m.
There is a way to assign whole masks in the current implementation:
a = np.arange(9, maskna=True).reshape((3,3)) a array([[0, 1, 2], [3, 4, 5], [6, 7, 8]]) mask = np.array([[False, False, True], [False, True, False], [True, False, True]]) np.copyto(a, np.NA, where=mask) a array([[0, 1, NA], [3, NA, 5], [NA, 7, NA]])
I think the "ValueError: Cannot assign NA to an array which does not support NAs" when trying to copy an array with a mask to an array without a mask is a bug..
a = np.arange(9, maskna=True).reshape((3,3)) a.flags.maskna True b = a.copy(maskna=False) b.flags.maskna False
It should be possible to remove a mask when copying an array.