I want to display the legend but it wont show. I am plotting a tree like below but the code doesn't show legend. The problem occurs when I set breaks. I have two levels (E.2020, M.2021).
library(ggtree)
tree<-ggtree(midpoint(tre), size=3.0, aes(color = V2), show.legend=TRUE) %<+% class
tree + geom_tiplab(size=12, linesize=1.2) + theme(legend.position = 'right', legend.title = element_text(size = 15), legend.text = element_text(size = 15)) + scale_colour_discrete("class", breaks=levels(class$V2))+ xlim(0, 0.5)
