ggplot inserting space before degree symbol on axis label

Question

I\'d like to put a degree symbol on the x axis but the result has an extra space that I can\'t seem to get rid of. The text should read \'Temperature (*C)\', not \'Temperature (

Answer 1

When using expression() the ~ symbol makes a space and the * symbol sticks things together. See code below:

ggdat<-data.frame(x=rnorm(100),y=rnorm(100))

ylab <- expression('stuck'*'together'*'eg:'*mu*'liter')
xlab <- expression('sep'~'par'~'at'~'ed'~'eg:'~mu~'liter')

ggplot(data=ggdat,aes(x=x,y=y)) +
  geom_point() +
  labs(x=xlab,
       y=ylab)