Fatal error when exporting attributes containing a '&' sign

[gvegayon]

Originally reported by: Tobias Jørgensen (Bitbucket: bornakke, GitHub: bornakke)

---

Hi George,

Thanks for a so needed R extension which I'm often using.

Currently I'm however encountering an error whenever I have attributes containing an & sign.

Code to reproduce the error:

#!r

library(igraph)
library(rgexf)
g <- erdos.renyi.game(100, 1/100)

g <- set.vertex.attribute(g, "test", index=V(g), "Some & Some")
gexf <- igraph.to.gexf(g)

Error given:
xmlParseEntityRef: no name
Error: 1: xmlParseEntityRef: no name

Any suggestions to why this might happen? In the current situation I can probably just remove any &, however it took me more than an hour to identify the cause of the error which is difficult to guess based on the error message.

Best regards
Tobias

---

• Bitbucket: https://bitbucket.org/gvegayon/rgexf/issue/25

[gvegayon]

Original comment by George Vega Yon (Bitbucket: gvegayon, GitHub: gvegayon):

---

Hi Tobias, I were able to reproduce the error message (thanks). Will fix it later.

Thanks!

George