ggplot mapping aes error when I add anything

Question

When I plot barplot like this:

p<- ggplot(corttestunitedcol, aes(x=Sex, y=mean, fill=Treatment_Status)) + 
  geom_bar(stat="identity", color="black", 
           position=position_dodge()) +
  geom_errorbar(aes(ymin=mean-sd, ymax=mean+sd), width=.2,
                position=position_dodge(.9))

beautiful. What I want.

However, if I add anything to this, it get

Error: mapping must be created by aes()

For example adding titles:

p<- ggplot(corttestunitedcol, aes(x=Sex, y=mean, fill=Treatment_Status)) + 
  geom_bar(stat="identity", color="black", 
           position=position_dodge(),
           labs(title = "Corticosterone",
                y = "mean plasma Corticosterone (pg/ml)", x = "")) +
  geom_errorbar(aes(ymin=mean-sd, ymax=mean+sd), width=.2,
                position=position_dodge(.9))

Or

p<- ggplot(corttestunitedcol, aes(x=Sex, y=mean, fill=Treatment_Status)) + 
  geom_bar(stat="identity", color="black", 
           position=position_dodge(),
          facet_wrap(~Sex)) +
  geom_errorbar(aes(ymin=mean-sd, ymax=mean+sd), width=.2,
                position=position_dodge(.9))

How do I fix this?

don't put it into geom_* function, just add after all geoms + facet_wrap(~Sex) — inscaven
– inscaven, Commented Sep 1, 2020 at 11:48
What @inscaven said is also valid for the labs in the "For example adding titles:" code. — Rui Barradas
– Rui Barradas, Commented Sep 1, 2020 at 12:16

rodolfoksveiga · Accepted Answer · 2020-09-01 12:37:45Z

It would be nice if you've shared the whole code with all the necessary variables to execute it, then we could reproduce your results.

Anyway, I think you're adding ggplot functions in the wrong way. labs() and facet_wrap() are functions just like geom_bar() and geom_errorbar(). Therefore, you should also add them, instead of throwing them into geom_bar().

I think the following code chunk would solve your problem:

p <- ggplot(corttestunitedcol, aes(x = Sex, y = mean, fill = Treatment_Status)) + 
  geom_bar(stat = 'identity', colour = 'black',
           position = position_dodge()) +
  geom_errorbar(aes(ymin = mean - sd, ymax = mean + sd),
                width = 0.2, position = position_dodge(0.9)) +
  facet_wrap(. ~ Sex) +
  labs(title = 'Corticosterone',
       x = '', y = 'mean plasma Corticosterone (pg/ml)')

Let us know if your problem was solved.

Collectives™ on Stack Overflow

ggplot mapping aes error when I add anything

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related