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## Re: [igraph] Nodes at a given distance

 From: Gabor Csardi Subject: Re: [igraph] Nodes at a given distance Date: Fri, 25 Jul 2008 05:10:15 -0500 User-agent: Mutt/1.5.17+20080114 (2008-01-14)

```http://en.wikibooks.org/wiki/Python_Programming/Sets#Set_Difference

seems to be good enough.

G.

On Fri, Jul 25, 2008 at 12:05:40PM +0200, Marco wrote:
> Oh, ok!
>
> I am using just python+igraph, that's why i was unable to find the setdiff. :)
>
> I guess that now that i know what setdiff does, i can find or write
> something that does the same in python.
>
> thanks again,
>
> marco
>
>
> On Fri, Jul 25, 2008 at 11:59 AM, Gabor Csardi <address@hidden> wrote:
> > Marco, do you actually use R? If yes, see ?setdiff.
> >
> > setdiff is an R function, it is the difference operation between
> > two sets, it calculates the elements that are in the first set,
> > but not in the second. Maybe there is something similar in Python,
> > but you'll have to write it for yourself if you use C. It is not
> > hard, just sort both vectors and go over them once to keep the elements
> > that are in the first vector only. As always, using a higher level
> > language is easier.
> >
> > Best,
> > Gabor
> >
> > On Fri, Jul 25, 2008 at 11:54:45AM +0200, Marco wrote:
> >> Hi,
> >>
> >> it sounded too great to work straight away: one stupid question arises.
> >> What is setdiff? :|
> >>
> >> thanks and sorry,
> >>
> >> marco
> >>
> >>
> >>
> >> --
> >> è il gioco della vita,
> >> la dobbiamo preparare
> >> che non ci sfugga dalle dita
> >> come la sabbia in riva al mare.
> >>
> >> Lucio Dalla
> >>
> >>
> >> _______________________________________________
> >> igraph-help mailing list
> >> http://lists.nongnu.org/mailman/listinfo/igraph-help
> >
> > --
> > Csardi Gabor <address@hidden>    UNIL DGM
> >
> >
> > _______________________________________________
> > igraph-help mailing list
> > http://lists.nongnu.org/mailman/listinfo/igraph-help
> >
>
>
>
> --
> è il gioco della vita,
> la dobbiamo preparare
> che non ci sfugga dalle dita
> come la sabbia in riva al mare.
>
> Lucio Dalla
>
>
> _______________________________________________
> igraph-help mailing list