I have a question about creation of numpy arrays from a list of
objects, which bears on the Quantities project and also on masked
arrays:
>>> import quantities as pq
>>> import numpy as np
>>> a, b = 2*pq.m,1*pq.s
>>> np.array([a, b])
array([ 12., 1.])
Why doesn't that create an object array? Similarly:
>>> m = np.ma.array([1], mask=[True])
>>> m
masked_array(data = [--],
mask = [ True],
fill_value = 999999)
>>> np.array([m])
array([[1]])
This has broader implications than just creating arrays, for example:
>>> np.sum([m, m])
2
>>> np.sum([a, b])
13.0
Any thoughts?
Thanks,
Darren
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