[R] graph from txt file

[Rui Barradas]

Hello,

Package igraph can create graphs. Example:

dat <- read.table(text="
node1  node2  attr1  attr2
2  1  2  3
3  2  3  2
4  3  4  2
6  5  1  4
", header=TRUE)
dat

vertices <- as.vector( t(dat[, 1:2]) )

g <- graph(vertices, directed=FALSE)
E(g)$weight <- dat$attr1
E(g)$color <- dat$attr2

plot(g, layout=layout.circle, edge.label=E(g)$weight, edge.color=E(g)$color)


Also, you should post data examples like the posting guide says.
With your description, a small example like the one above would do.

Hope this helps,

Rui Barradas

Em 29-06-2012 19:05, HIMANSHU MITTAL escreveu:
> yes i would prefer igraph, but it can be any r package as long as it can
> create the graph
>
> On Fri, Jun 29, 2012 at 11:14 PM, Peter Ehlers <ehlers at ucalgary.ca> wrote:
>
>> On 2012-06-29 10:28, HIMANSHU MITTAL wrote:
>>
>>> Hi all,
>>> I have a text file in which the graph info is stored as:
>>> node1 node2 attr1 attr2
>>> where there is an edge b/w node1&2 and attr1&2 are edge atttributes
>>>
>>>   is there any way to create a graph using such format in r?
>>>
>>
>> The igraph package?
>>
>> Peter Ehlers
>>
>>
>>> Regards,
>>> Himanshu Mittal
>>>
>>>         [[alternative HTML version deleted]]
>>>
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>>>
>>
>>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>