Upgrading to version 3.10 of ggplot2 I encountered a strange behaviour
with regards to non-ascii (utf-8) characters in labels.
In some cases ggplot will wrap the labels with backticks. In other cases
(with the same character) it will not. I have been examining this and it
seems that the strange behaviour only occurs when the non-ascii character
isn't the first one in the string. Thus in the example below when mán is the variable on
the x axis it gets wrapped but ár does not.
# pseudo data with the same non-ascii letter in two different locations.
> df=data.frame(ár=rep(1991:2000,each=12),mán=rep(1:12,10))
> df$hiti=with(df,ár/2000 + 10* sin(mán/12*2*pi) + rnorm(120))
> library(ggplot2)
> ggplot(data=df,aes(mán,hiti)) + geom_point()
> ggplot(data=df,aes(ár,hiti)) + geom_point()
Upgrading to version 3.10 of ggplot2 I encountered a strange behaviour
with regards to non-ascii (utf-8) characters in labels.
In some cases ggplot will wrap the labels with backticks. In other cases
(with the same character) it will not. I have been examining this and it
seems that the strange behaviour only occurs when the non-ascii character
isn't the first one in the string. Thus in the example below when mán is the variable on
the x axis it gets wrapped but ár does not.