Multirow axis labels with nested grouping variables

Question

I would like the levels of two different nested grouping variables to appear on separate lines below the plot, and not in the legend. What I have right now is this code:

Answer 1

A very simple solution which gives a similar (though not identical) result is to use faceting. The downside is that the Category label is above rather than below.

ggplot(data=data, aes(x=Group, y=Value, fill=Group)) +
  geom_bar(position = 'dodge', stat="identity") +
  geom_text(aes(label=paste(Value, "%")), position=position_dodge(width=0.9), vjust=-0.25) + 
  facet_grid(. ~ Category) + 
  theme(legend.position="none")