ylim specification when scale_format set to percent

[Rob James]

Can one/how might one specify limits for ylim when scale_y_continuous
specifies (... formatter="percent")?

[Brandon Hurr]

Rob,
I'm not sure what exactly you're after, but the following code seems
to allow me to set the percentages from 0 to 100 by specifying the
limits as between 0 and 1...

asdf<-runif(5)
ghjk<-c("A", "B", "C", "D", "E")
A1<-as.data.frame(cbind(asdf, ghjk))
A1[[1]]<-as.numeric(as.character(A1[[1]]))

ggplot(data=A1)+
geom_point(aes(x=ghjk, y=asdf))+
scale_y_continuous(limits=c(0, 1), formatter="percent")

Is that what you're looking for?

Brandon

[Rob James]

Brandon,

Thanks for the ideas. Sorry for the delay in following up. This just
documents for completeness.

Here's was the problem and solution..(rather obvious when you come back
at it):

x <-abs(rnorm(100))
df <-data.frame(x)
df$rate <- df$x/100
ggplot(df)+geom_point(aes(x=x,
y=rate))+scale_y_continuous(formatter='percent')

Works fine.

In my dataset, range was 0-3%... Say I wanted 0-10% on the Y axis.

ggplot(df)+geom_point(aes(x=x,
y=rate))+scale_y_continuous(formatter='percent')+ylim(0,0.1)

Does not do as expected, and forces the y scale back to decimal notation.

ggplot(df)+geom_point(aes(x=x,
y=rate))+scale_y_continuous(formatter='percent', limits=c(0,0.1))

works fine.

The ylim documentation might be improved to note interaction with
formatter, or the code might be improved to handle formatter interactions.

As always, thanks to Hadley.