Re: [igraph] add vertex attributes from a data.frame

[Simone Gabbriellini]

Hi Gabor,

thank you very much, it seems to work on my data too|

best,
Simone

Il giorno 24/mar/2011, alle ore 21.27, Gábor Csárdi ha scritto:

> Hi Simone,
> 
> On Thu, Mar 24, 2011 at 3:50 PM, Simone Gabbriellini <address@hidden> wrote:
>> Hello List,
>> 
>> i am trying to add a vertex attribute from a data.frame like:
>> 
>>> 
>> who_invited_whom
>> 
>>    invited inviter
>> 1   user139  user83
>> 2   user140  user83
>> 3   user141  user83
>> 4   user142  user83
>> 5   user143  user83
>> 6   user144  user83
>> 
>> I would like to add an attribute "invitedby" to vertex of type==0. I am 
>> trying this:
>> 
>> V(g)[type==0 & name %in% 
>> who_invited_whom$invited]$invitedby<-who_invited_whom$inviter
> 
> You get the warning because the number of vertices you select on the
> left hand side does not match the length of the right hand side.
> 
> But anyway, I think this is wrong, because nothing ensures that the
> order of the vertices is the same on the left and right hand side. I
> think you want something like
> 
> V(g)$invitedby <- as.character(NA)
> ord <- match(who_invited_whom$invited, V(g)$name[V(g)$type==0])
> V(g)$invitedby[V(g)$type==0][ord] <- as.character(who_invited_whom$inviter)
> 
> I haven't tested it much, it seems to work for the toy data I just made up.
> 
> Best,
> Gabor
> 
>> Warning message:
>> In graph[[9]][[3]][[name]][index] <- value :
>>  il numero di elementi da sostituire non `e un multiplo della lunghezza di 
>> sostituzione
>> 
>> Why am I getting the warning? Am I doing something wrong here?
>> 
>> thanks for your help!
>> 
>> best regards,
>> Simone
>> _______________________________________________
>> igraph-help mailing list
>> address@hidden
>> http://lists.nongnu.org/mailman/listinfo/igraph-help
>> 
> 
> 
> 
> -- 
> Gabor Csardi <address@hidden>     MTA KFKI RMKI
> 
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