[igraph] attribute problem with graph.data.frame

[Yannick Rochat]

Dear all,

I've got a 3 columns data frame appearing like this :

> swap[1:4,]
                                 V3                                V4                   V5
1  ff8aa9e5295d5fbeb391e70865f888ba  7ddc60ba3dea9813aec037279dd81c5d  2010-02-19 14:40:29
2  b880733653704653d2a8329bb9507447  5cb1a800193e064ba95536d6a5018b91  2010-02-19 14:40:35
3  1bace89087a54bb01a093621fc374026  d1c16d22f59bfec0951d13692dc4c77e  2010-02-19 14:40:36
4  c8873ed38a44311388e6870a4dfd55d6  eb212222de32bfc2d2d51f01f2b20848  2010-02-19 14:40:43

with V3 source nodes, V4 target nodes and V5 a time stamp I need as an attribute. When importing it to create a graph I get this message error :

> graph.data.frame(as.matrix(swap),directed=TRUE) -> g1.sw

Erreur dans attrs[[names(d)[i]]] <- newval :
  tentative de sélectionner moins d'un élément

(transl. "you tried to select less than one element").

Could you please help me and tell me what I'm doing wrong ? 


Thank you very much !



Yannick



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Yannick Rochat - IMA - Université de Lausanne
http://www.unil.ch/unisciences/YannickRochat