On Jul 24, 2010, at 2:42 PM, Thomas Robitaille wrote:
Hi,
If I create a structured array with vector columns:
array = np.array(zip([[1,2],[1,2],[1,3]]),dtype=[('a',float,2)])
then examine the type of the column, I get:
array.dtype[0]
dtype(('float64',(2,)))
Then, if I try and view the numerical type, I see:
array.dtype[0].type
type 'numpy.void'
I have to basically do
array.dtype[0].subdtype[0]
dtype('float64')
to get what I need. I seem to remember that this used not to be the case, and
that even for vector columns, one could access array.dtype[0].type to get the
numerical type. Is this a bug, or deliberate?
This looks the same as I remember it. The dtype is a structured array with
the filed name 'a' having an element which is a vector of floats. As a
result, the first dtype[0] extracts the vector of floats dtype. This must be
type void because it is a vector of floats. To get to the underlying type,
you have to do what you did. I don't see how it would have worked another way
in the past.
-Travis
Thanks,
Thomas
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Travis Oliphant
Enthought, Inc.
oliph...@enthought.com
1-512-536-1057
http://www.enthought.com
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