Re: [igraph] Igraph and SONIA

[Simone Gabbriellini]

thanks Gabor!

it would be great to have it included in the next igraph release.

best,
Simone


Il giorno 20/ott/2010, alle ore 17.40, Gábor Csárdi ha scritto:

> Lorenzo, Simone,
> 
> here is a function that seems to work on two of the three examples at
> the sonia website:
> 
> sonia2igraph <- function(filename, directed=TRUE) {
>  lines <- readLines(filename)
>  lines <- grep("^//", lines, value=TRUE, invert=TRUE)
>  fromid <- grep("^FromId", lines)[1]
>  nodes <- lines[1:(fromid-1)]
>  edges <- lines[fromid:length(lines)]
> 
>  nodes <- strsplit(split="\t", nodes)
>  nodesnames <- nodes[[1]]
>  nodes <- data.frame(do.call(rbind, nodes[-1]))
>  colnames(nodes) <- nodesnames
>  colnames(nodes)[1] <- "name"
> 
>  edges <- strsplit(split="\t", edges)
>  edgesnames <- edges[[1]]
>  edges <- data.frame(do.call(rbind, edges[-1]))
>  colnames(edges) <- edgesnames
> 
>  graph.data.frame(edges, directed=directed, vertices=nodes)
> }
> 
> All attributes are added as strings, modify the function if you want
> to convert them to numeric and/or use the igraph attribute names:
> 'color', etc. Clusters are not supported.
> 
> The third example file does not work, because it contains multiple
> lines for the same vertex, and I don't know what this means. They do
> not say anything about this on the website, unfortunately.
> 
> I have added a bug report for putting (and extended version of) this
> into igraph:
> https://bugs.launchpad.net/igraph/+bug/663959
> 
> Best,
> Gabor
> 
> On Wed, Oct 20, 2010 at 5:04 PM, Simone Gabbriellini
> <address@hidden> wrote:
>> Gabor,
>> 
>> http://sourceforge.net/apps/mediawiki/sonia/index.php?title=Son_format
>> 
>> I am interested too, so I've joined the thread
>> 
>> best,
>> simone
>> 
>> Il giorno 20/ott/2010, alle ore 16.58, Gábor Csárdi ha scritto:
>> 
>>> Lorenzo,
>>> 
>>> could you please point me to the SONIA file format? Time information
>>> can be added as vertex/edge attributes, so that is not a problem I
>>> guess.
>>> 
>>> Best,
>>> Gabor
>>> 
>>> On Wed, Oct 20, 2010 at 4:44 PM, Lorenzo Isella
>>> <address@hidden> wrote:
>>>> Dear All,
>>>> I am not experienced at all about the various formats for storing networks,
>>>> but someone told me that the SONIA format is quite common for
>>>> visualizing/representing dynamical networks.
>>>> I found several online resources telling how to save an igraph graph in the
>>>> SONIA format, e.g.
>>>> 
>>>> http://bit.ly/fTqhQ and
>>>> http://cran.r-project.org/web/packages/igraphtosonia/
>>>> 
>>>> but can I also go the other way around (reading a graph stored in the SONIA
>>>> format as an igraph graph)? Or am I asking a question which does not make
>>>> sense as igraph would (perhaps) have troubles in dealing with nodes/edges
>>>> specified as having a finite lifetime?
>>>> Many thanks
>>>> 
>>>> Lorenzo
>>>> 
>>>> _______________________________________________
>>>> igraph-help mailing list
>>>> address@hidden
>>>> http://lists.nongnu.org/mailman/listinfo/igraph-help
>>>> 
>>> 
>>> 
>>> 
>>> --
>>> Gabor Csardi <address@hidden>     UNIL DGM
>>> 
>>> _______________________________________________
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>> 
>> 
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> 
> 
> 
> -- 
> Gabor Csardi <address@hidden>     UNIL DGM
> 
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