[Numpy-discussion] Questions about masked arrays
Pierre GM
pgmdevlist@gmail....
Tue Oct 6 23:33:00 CDT 2009
On Oct 7, 2009, at 12:10 AM, Gökhan Sever wrote:
> Created the ticket http://projects.scipy.org/numpy/ticket/1253
Want even more confusion ?
>>> x = ma.array([1,2,3],mask=[0,1,0], dtype=int)
>>> x[0].dtype
dtype('int64')
>>> x[1].dtype
dtype('float64')
>>> x[2].dtype
dtype('int64')
Yet another illustration of the masked constant... The more I think
about it, the more I think we should have a specific object
("MaskedConstant") that would do nothing but tell us that it is masked.
> Could you tell me briefly what was the source of leak in arccos case?
No idea, as I still haven't figured why you were having the problem in
the first place
> And how do you write a test code for these cases?
assert(np.arccos(ma.masked), ma.masked) would be the simplest.
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