Re: [igraph] edge attribute indexing in R

[Gábor Csárdi]

Hi Michael,

it is a known bug:
https://bugs.launchpad.net/igraph/+bug/528963

As a workaround, you can do things by not using the smart indexing:

which(E(g)$weight < 1.5)-1

gives you the edge ids you're looking for.

Best,
Gabor

On Thu, Mar 25, 2010 at 4:56 PM, Michael Barnett <address@hidden> wrote:
> Hi igraph list,
>
> New igraph list member here. I wanted to write to ask if anyone else has
> encountered this issue. I'm using R 2.10 in Mac OS 10.5.8. Whenever I try to
> index an igraph network object by an edge attribute, R is incredibly slow
> for the large-ish networks I'm working with, on the range of hundreds to
> thousands of nodes. I use the exact notation in the help file, typing for
> instance:
>
> E(net)[ weight < 1.5]$weight
>
> This code works for me when I make simple test networks, but not for the
> larger datasets I'm working with. R becomes slow enough that I have to force
> exit the program after becoming impatient after a few minutes. Has anyone
> else encountered this issue? Is this a known bug?
>
> -Michael
>
>
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>



-- 
Gabor Csardi <address@hidden>     UNIL DGM