[igraph] problem with node names

[Umberto77]

Hi all,

I have a silly question, for me quite practical.

 

I have a database (vino_220510) containing exchanges among nodes and other information on a yearly time series.

I extracted a single year dataframe including 3 columms: reporting nodes, partner nodes, value of the exchange.

I used:

exp1999<-data.frame(vino_220510[vino_220510[, "year"]==1999, c("partner", "reporter", "value")])

 

I wanted to make a weighted directed network of it, where the values are the weights.

 

To do that I used:

write.table(exp1999, "exp1999.txt", row.names=FALSE)

exp1999<-read.graph("exp1999.txt", format="ncol", directed=TRUE, weights="yes", names=TRUE)

 

Unfortunately, "partner" and "reporter" became nodes, in fact they appear in the list "name".

 

get.vertex.attribute(exp1999, "name")

  [1] ""partner""  ""reporter"" ""ANT""

 

I tried using:

write.table(exp1999, "exp1999.txt")

 

but than I've got:

 

exp1999<-read.graph("exp1999.txt", format="ncol", directed=TRUE, weights="yes", names=TRUE)

Errore in read.graph.ncol(file, ...) : 

  At foreign.c:243 : Parse error in NCOL file, line 1 (syntax error, unexpected ALNUM, expecting NEWLINE), Parse error

 

How can I solve it?

 

Thanks,

Umberto

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