Scaling of plot depends on letter shapes in titles

[joergtrojan]

When trying to create two different graphs with identical dimensions, I stumbled across this problem.

Expected behaviour

Scaling of a graph should not depend on which letters are used in main or axis titles.

Actual behaviour

Using g, j, p, q, or y in a title leads to different vertical scaling of the graph.

Suspected cause

The space calculation is probably not based on the font baseline but rather on the absolute letter size. I guess this is a general issue with element_text().

# y-scaling should look exactly the same, but doesn't.
ggplot(mtcars, aes(mpg, wt)) + geom_point() + ggtitle("Title with an h")
ggplot(mtcars, aes(mpg, wt)) + geom_point() + ggtitle("Title with a g")

[thomasp85]

This is related to the #2471 PR

[hadley]

Duplicate of #2288

[lock]

This old issue has been automatically locked. If you believe you have found a related problem, please file a new issue (with reprex) and link to this issue. https://reprex.tidyverse.org/