Aha - yeah. Sorry, using arrays works, but not lists. (important to know, though) On 30 September 2013 19:11, Tiago de Paula Peixoto <tiago@skewed.de> wrote:

On 09/30/2013 07:09 PM, Rene Pfitzner wrote:

...

Thanks Tiago!

Let me just point out that the part

mask.a = g.degree_property_map("out").a > 4

will (if you are using python 2.x) not give you what you most likely would like to have, namely a list of boolean values containing the results of the element wise comparisons of elements g.degree_property_map("out").a[i]>4. Instead, for some strange reason, you'll simply get the *value* True back, writing True to all elements in mask.a ... instead, it seems to me, the only (fastest) way to do it is to use map

mask.a = map(lambda(x): x > 4, g.degree_property_map("out").a)

.... so be careful.

Are you sure?

I get the following with python 2 and numpy 1.7.1:

In [4]: arange(10) Out[4]: array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])

In [5]: arange(10) > 2 Out[5]: array([False, False, False, True, True, True, True, True, True, True], dtype=bool)

Cheers, Tiago

-- Tiago de Paula Peixoto <tiago@skewed.de>

-- René Pfitzner, Dipl. Phys. Scientific assistant / Doctoral candidate ETH Zürich Chair of Systems Design +41-44-63-28478 rpfitzner@ethz.ch http://www.sg.ethz.ch/people/prene