Re: [igraph] as.undirected() strips vertex attributes?

[uxzmdlj02]

Ok, thanks for the response.

By the way, any idea of timeframe for the 0.5 release? I have some R  
code for cohesive blocking (as in Moody, While 2003) that I was  
planning to hand over to the project, and maybe before a point  
release would be the best time...

Oh, and in case anybody else uses it, my function from the last email  
should be:

as.undirected2 <- function(g){
    ## store the attributes:
    tempAtt <- list()
    for(a in list.vertex.attributes(g)){
        tempAtt <- c(tempAtt,list(get.vertex.attribute(g,a)))
        names(tempAtt)[length(tempAtt)] <- a
    }

    ## convert the graph:
    res <- as.undirected(g)

    ## restore the attributes:
    for(a in names(tempAtt)){
        set.vertex.attribute(res,a,value=tempAtt[[a]])
    }
    return(res)
}



On Sep 21, 2007, at 3:00 PM, Tamas Nepusz ntamas-at-rmki.kfki.hu | 
igraph-help| wrote:

> > It looks like as.undirected() strips vertex attributes in igraph
> > 0.4.3. Is this a bug?
> Yes, unfortunately that's a bug - thanks for reporting it. It will be
> fixed in igraph 0.5 (I already added an entry in our issue tracker).
> The workaround you implemented seems okay to me, but since the cause
> of this issue is in the low-level C layer of the library, it will be
> fixed there (so we don't have to work out a workaround for every
> single higher level interface).
>
> --
> Tamas
>
>
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