Mark certain axis text in bold

Question

I want to mark the text that matches "GTAAACATCCTCGACTGGAAGC" bold in my plot. What I have tried is this:

theme(axis.text.y=element_text(face=ifelse(levels(miR10b_30a$ID2)==
                                          "GTAAACATCCTCGACTGGAAGC","bold")))

It gives this error:

Error in check.length("fontface") : 'gpar' element 'fontface' must not be length 0

Any other good ways of doing this?

Answer 1

The problem in your code is ifelse.
Here is an example that should clarify the point:

vec_fontface <- ifelse(levels(iris$Species)=="setosa","bold","plain")
ggplot(iris, aes(Species, Sepal.Length)) + geom_point() +
theme(axis.text.x=element_text(face=vec_fontface))