[R] problem in function specieslevel of bipartite

[Bernardo Santos]

Dear all,
I have data for an bipartite mutualistic interaction network and I am trying to generate network metrics for this data set.
All metrics could be calculated correctly. However, when trying to run specieslevel function of the package "bipartite", I have the following problem:
xx <- specieslevel(matt)
Erro em data.frame(degree = c(16, 11, 6, 5, 6, 4, 5, 4, 2, 5, 7, 4, 4,  : 
  string multibyte inválida 4
orxx <- specieslevel(matt, index="species strength")
Erro em data.frame(`species strength` = c(8.60588008182592, 3.82680284670328,  : 
  string multibyte inválida 4
Do you have a clue on what may be the problem?
Thanks in advance!Best,Bernardo Niebuhr


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