xgx_scale_y_percentchangelog10() + geom_jitter() has problems with -100%

[iamstein]

Hey @margoal1, the -100% (-1) points disappear when using geom_jitter(), but not when using geom_point(). Compare the two plots below. I'm not sure if this is xgx's fault or ggplot2's fault, but just wanted to raise the issue.

data = data.frame(x = c(0, 0, 1, 1, 2, 2), y = c(1, 0, -1, -.5, -1, -1))
ggplot(data, aes(x = x, y = y)) + geom_point() + xgx_scale_y_percentchangelog10()
ggplot(data, aes(x = x, y = y)) + geom_jitter(height = 0, width = 0) + xgx_scale_y_percentchangelog10()

[iamstein]

One other comment, I don't like the default breaks for xgx_scale_y_percentchangelog10(). Would much prefer it be (-75%, -50%, 0%, 50%, 100%) than what's shown above. In my code, I've fixed it just by setting my own breaks, but I think this could potentially be automated to choose something better.

[iamstein]

@margoal1: Ooh, the problem is in ggplot2!

data = data.frame(x = c(0, 0, 1, 1, 2, 2), y = c(0, 0, 0, 1, 2, 3))

ggplot(data, aes(x = x, y = y)) + geom_point() + scale_y_log10()
ggplot(data, aes(x = x, y = y)) + geom_jitter(height = 0, width = 0) + scale_y_log10()

[iamstein]

Because this is a ggplot2 issue, I filed an issue on their github page and will close the issue, here.
tidyverse/ggplot2#4790