Re: [igraph] vertex order

[Gábor Csárdi]

Dear Prof Freeman,

One solution is that you specify the names in a character vector, when
reading the file:

g <- read.graph(filename, format="ncol", predef=myvertexnames)

But you need to know the vertex names vertices beforehand. Here is how
to find them from the file itself:

myvertexnames <- unique(sort(scan(filename, what="")))

Or, if you have numbers as vertex names:

myvertexnames <- unique(as.character(sort(scan(filename))))

I hope this helps. Best Regards,
Gabor

On Tue, Dec 14, 2010 at 4:20 PM, Lin Freeman <address@hidden> wrote:
> Hi,
> Because of the ordering of edges presented in an "ncol" edgelist data entry,
> I get an output in which my vertices are not in order:
>
> Vertex sequence:
>  [1] "1"  "2"  "3"  "4"  "5"  "6"  "7"  "8"  "9"  "11" "12" "13" "14" "18"
> "20"
> [16] "22" "32" "31" "10" "28" "29" "33" "17" "34" "15" "16" "19" "21" "23"
> "24"
> [31] "26" "30" "25" "27"
>
>
> I would very much like to have the vertices and their memberships (in the
> membership vector) presented in their natural order.  How can I accomplish
> that?
>
> Lin
> --
> Linton C. Freeman
> Institute for Mathematical Behavioral Sciences and
> Department of Sociology
> School of Social Sciences  SSPA 2143
> University of California
> Irvine, CA 92697-5100
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-- 
Gabor Csardi <address@hidden>     UNIL DGM