Re: [igraph] R igraph: get.shortest.paths returns error

[Tobias Heckmann]

Dear Tamas,

my RData file is unfortunately too large to send (43 MB).
I have now tried a random graph, and get.shortest.paths returns the same 
error... Hence, it doesn't seem to depend on my data. I've attached the 
RData file for my graph and my sessionInfo.

Thank you very much for dealing with my problem !
Best regards
Tobias


Am 08/08/2012 09:48, schrieb Tamás Nepusz:
> Dear Tobias,
>
> This is strange; I still cannot reproduce your issue on my machine, neither with "ordinary" R 
> vectors nor with vertex sequences. Could you send me an Rdata file with an example graph and a 
> "startnode" and "tonodes" vector that causes problems on your machine?
>
> Best,--
> T.
>
>
> On Wednesday, 8 August 2012 at 09:25, Tobias Heckmann wrote:
>
> > Dear Tamas,
> >   
> > in the original version of my script (which worked on my old machine),
> > startnode is a simple R vector:
> > > str(startnode)
> >   
> > num 177822
> >   
> > while tonodes seems to be a vector sequence:
> > > str(tonodes)
> >   
> > Class 'igraph.vs' atomic [1:286] 157812 158206 158605 158989 159367 ...
> > ..- attr(*, "env")=<environment: 0x1013523c>
> >   
> > in ?get.shortest.paths, it reads that the "to" argument should be a
> > "numeric vector, the vertices to which the shortest paths will be
> > calculated..."
> > Hence, I also tried as.numeric(tonodes) in the "to" argument, but the
> > error remains the same.
> >   
> > Cheers,
> > Tobias
> >   
> > Am 08/08/2012 08:43, schrieb Tamas Nepusz:
> > > Dear Tobias,
> > >   
> > > > Until today, the following command worked well:
> > > >   
> > > > paths<-get.shortest.paths(graph,from=startnode,to=tonodes,mode="out",weights=NA,output="epath")
> > > >   
> > > > Today, I installed R on a 64bit machine and tried running my script again.
> > > > This time, the command returned the following error:
> > > >   
> > > > "At structural_properties.c:659 : Size of the `vertices' and the `to'
> > > > should match, Invalid value"
> > >   
> > >   
> > > I have tried this now on a random graph with random start and end nodes and
> > > it seemed to work for me, so can you please let us know what is there in the
> > > "startnode" and "tonodes" variables? Are they simple R vectors?
> > >   
> > > Cheers,
> > > Tamas
> > >   
> > > _______________________________________________
> > > igraph-help mailing list
> > > address@hidden (mailto:address@hidden)
> > > https://lists.nongnu.org/mailman/listinfo/igraph-help
> >   
> >   
> >   
> >   
> > --
> > ---
> > Dr. Tobias Heckmann
> > Wiss. Angestellter
> > Lehrstuhl für Physische Geographie
> > Katholische Universität Eichstätt-Ingolstadt
> > Ostenstraße 18
> > 85072 Eichstätt
> >   
> > Tel.: 08421-93-1309
> > Fax: 08421-93-1787
> >   
> >   
> > _______________________________________________
> > igraph-help mailing list
> > address@hidden (mailto:address@hidden)
> > https://lists.nongnu.org/mailman/listinfo/igraph-help
>
>
>
> _______________________________________________
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--
---
Dr. Tobias Heckmann
Wiss. Angestellter
Lehrstuhl für Physische Geographie
Katholische Universität Eichstätt-Ingolstadt
Ostenstraße 18
85072 Eichstätt

Tel.: 08421-93-1309
Fax: 08421-93-1787

randomgraph_tamas.RData
Description: Binary data

sessionInfo.txt
Description: Text document