I'm trying to no avail adding the degree symbol to my points' labels using "labels" or "label" with "paste" and "expression" in ggplot to no avail. Any help would be greatly appreciated.
ggplot(df1,aes(min,xend=max,variable))+
geom_dumbbell(size = 1,
size_x =2.5,
size_xend =2.5,
colour = "grey",
colour_x = "blue",
colour_xend = "red")+
geom_point(aes(mean,alpha=0.5))+
geom_text(aes(mean,variable,label=round(mean,digits=2),hjust=0,vjust=-2),size=3)+
scale_size(guide=FALSE)+scale_alpha(guide=FALSE)+
theme_minimal()+
labs(title = "Indoor Air Temperature (°C)",
subtitle = "Minimum, Mean and Maximum",
x = "Temperature",
y = "")