Estou tentando alterar a cor dos nós dependentes do mês. No momento, eu fiz dessa maneira, que não é concisa e não funcionaria para grandes conjuntos de dados. Existe uma maneira melhor de fazer isso?

Data <- read.csv(.....) 

library(igraph)   

MartixData <- as.matrix(Data)

NetworkData <- graph.adjacency(MatrixData, mode="directed", weighted=TRUE)

V(NetworkData)

V(NetworkData)$month <- c("June", "July", "July", "February", "September", "June", "September", "June", "December", "September", "March", "April", "September")

plot(NetworkData, layout=layout.circle, vertex.color=c("yellow", "red", "red", "blue", "pink","yellow", "pink", "yellow", "gray", "pink", "black", "orange", "pink"))

Qualquer ajuda seria muito apreciada!

#Results for dput(NetworkData)
structure(list(13, TRUE, 
  c(0, 1, 1, 2, 5, 6, 7, 7, 8, 9, 10, 10, 12, 12, 12, 12, 12), 
  c(11, 4, 12, 0, 12, 1, 6, 12, 1, 4, 9, 12, 1, 5, 7, 10, 11), 
  c(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16), 
  c(3, 5, 8, 12, 1, 9, 13, 6, 14, 10, 15, 0, 16, 2, 4, 7, 11), 
  c(0, 1, 3, 4, 4, 4, 5, 6, 8, 9, 10, 12, 12, 17), 
  c(0, 1, 4, 4, 4, 6, 7, 8, 9, 9, 10, 11, 13, 17), 
  list(c(1, 0, 1), structure(list(), .Names = character(0)), 
 structure(list(name = c("A", "B", "C", "D", "E", "F", 
    "G", "H", "I", "J", "K", "L", "M"), month = c("June", 
    "July", "July", "February", "September", "June", "September", 
    "June", "December", "September", "March", "April", "September"
    )), .Names = c("name", "month")), structure(list(weight = c(6, 
    6, 7, 6, 7, 6, 6, 7, 7, 7, 6, 7, 7, 7, 7, 7, 7)), .Names = "weight"))), class = "igraph")