> #set shape of vertex attribute according to gender > V(graph1)$shape <- ifelse(female4 == 1, "circle", "square") If you have an NA value somewhere in the female4 vector, this will introduce NA values in the shape vector as well. E.g.:
> female4 <- c(1, 0, NA) > ifelse(female4 == 1, "circle", "square") [1] "circle" "square" NA So, the solution is to get rid of the NA values from your female4 vector. -- T. _______________________________________________ igraph-help mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/igraph-help
