Re: [igraph] Error while using edgelist function

[Gábor Csárdi]

Anupam,

the first argument of graph.edgelist should be an R matrix object, not
a filename. Use the normal R commands to read in your data first, and
then call graph.edgelist.

E.g.

edgelist <- read.table("<filename>", header=TRUE)
g <- graph.edgelist(as.matrix(edgelist))

See ?read.table and ?graph.edgelist for details. If your have large
files, then scan() will be faster than read.table, see ?scan.

Best,
Gabor

2009/3/23 anupam sinha <address@hidden>:
> Dear all,
>
>              While using the graph.edgelist funtion I give a file as the
> input. This file contains the edgelist representation of the metabolic
> network of yeast. The following is the kind of input I am giving and the
> error I am getting :
>
> Source_node Destination_node
> Q0045    Q0045
> Q0045    Q0250
> Q0045    Q0275
> Q0045    YDL067C
> Q0045    YGL187C
> Q0045    YGL191W
> Q0045    YHR051W
> Q0045    YIL111W
> Q0045    YLR038C
>
>
>  
> g<-graph.edgelist("/home/anupam/Desktop/network_analysis/gerstein_C-programs_network/met_network_yeast.txt",
> directed =FALSE)
> Error in
> graph.edgelist("/home/anupam/Desktop/network_analysis/gerstein_C-programs_network/met_network_yeast.txt",
> :
>   graph.edgelist expects a matrix with two columns
>
>
> Can anyone help me with this??? Thanks in advance.
>
>
> Regards,
>
> Anupam Sinha
>
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>
>



-- 
Gabor Csardi <address@hidden>     UNIL DGM