Add abcd labels on ggplot facets
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| library(ggplot2) | |
| #example dataset: | |
| mydata = data.frame(x = 1:10, y=1:10 | |
| , cat = c(rep('first', 3), rep('second', 3), rep('third', 4))) | |
| #create (a), (b), ... | |
| my_plotlabels = paste0('(', letters, ') ') | |
| #paste plot labels together with the levels of the variable used for faceting | |
| levels(mydata$cat) = paste0(my_plotlabels[1:length(levels(mydata$cat))] | |
| , levels(mydata$cat)) | |
| ggplot(mydata, aes(x=x, y=y))+ | |
| facet_wrap(~cat)+ | |
| geom_point(size=2, shape=7)+ | |
| theme_bw() |
