[Numpy-discussion] List of indices

April 2, 2010


      Hi All,
...
...
...
x=arange(10)
indices=[(1,),(2,)]
x[indices]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: unsupported iterator index
But following works.
...
...
...
x=x.reshape(5,2)
x
array([[0, 1],
       [2, 3],
       [4, 5],
       [6, 7],
       [8, 9]])
indices=[(1,0),(0,1)]
x[indices]
array([2, 1])
Should not the first one also work? How to convert [(1,),(2,)] to
[1,2] efficiently.

Thanks,
Shailendra