Shorten barplot in ggplot2 dodge_position

Question

I tried to perform a ggplot2 geom barplot using the dodge position parameter comparing two different conditions. However, if one of the two condition has frequncy 0, while the other one is > 0, the bar occupies both position. So I would like to shorten it with a smaller base length. This example will be easier to understand:

and my code:

library(ggplot2)

ggplot(df_plot2, aes(x=Var1, y=perc,fill=TYPE))+
  geom_bar(stat = 'identity', position='dodge')+
  labs(y="Percentage", x="Gene Ontologies") +
  theme_classic()+
  scale_fill_manual(name = "Transcripts of:", values=c("#ff6c00","grey20")) +
  theme(axis.text.x = element_text(angle = 60, hjust = 1), text = element_text(size = 16))

Thanks a lot!

Answer 1

You have to add the preserve = single option to position_dodge

geom_bar(position = position_dodge2(preserve = "single"))

https://ggplot2.tidyverse.org/reference/position_dodge.html