[Numpy-discussion] structured array from ordinary array
Ernest Adrogué
eadrogue@gmx....
Sun Dec 13 19:54:54 CST 2009
Hi,
How does one generate a structured array from a normal
array?
I use the 'view' method, but this way I get a superfluous
dimension that I do not want. Example:
In [619]: a = np.array([[1,2,3],[1,2,3],[1,2,4]],int)
In [620]: struct = np.dtype([('a',int),('b',int),('c',int)])
In [621]: a.view(struct)
Out[621]:
array([[(1, 2, 3)],
[(1, 2, 3)],
[(1, 2, 4)]],
dtype=[('a', '<i8'), ('b', '<i8'), ('c', '<i8')])
In [622]: a.view(struct)['a']
Out[622]:
array([[1],
[1],
[1]])
In [623]: a.view(struct)['a'].shape
Out[623]: (3, 1)
I'd like the last array to have shape (3,).
What am I doing wrong??
Ernest
More information about the NumPy-Discussion
mailing list