I've used ggplot2 code like this for some time without any warnings to have a "left" and "right" caption:
. . . +
labs(caption=c(plotCaptionLeft, plotCaptionRight)) +
theme(plot.caption = element_text(hjust=c(0.0,1.0)))
... which creates something like this:
In ggplot2_3.3.0 I'm seeing this warning now:
## Warning: Vectorized input to `element_text()` is not officially supported.
## Results may be unexpected or may change in future versions of ggplot2.
Should I ignore the warning until RStudio decides how a vectorized element_text() will work? Or is there a better way to code this now to avoid the warning?