grouping in geom_boxplot broken after upgrading from 3.5.2 to 3.6.1

[ovvldc]

Following the advice in https://ggplot2.tidyverse.org/reference/geom_boxplot.html, I made a box plot with manually created statistics, using:

geom_boxplot( data = stats, aes(x = x, group = set, ymin = Minimum, lower = Lower_quartile, middle = Median, upper = Upper_quartile, ymax = Maximum, colour = set, fill = set), width = 0.5, stat = "identity", show.legend = FALSE ) +

This worked wonderfully until today, after I upgraded from R 3.5.2 to 3.6.1 and reinstalled and updated my packages. Now this happens:

print(graph)
Error: Can't draw more than one boxplot per group. Did you forget aes(group = ...)?

Clearly, I did not forget, and it was working fine yesterday. The input data has also not changed.

[ovvldc]

I can make both data and full script available, but this is an ongoing research project with personally identifiable data, so I cannot just post it here.

[ovvldc]

here is the input data for the box plot at least: stats.txt

[ptoche]

you should make a fully reproducible example with a dataset such as cars, and even better use reprex.

[clauswilke]

This is listed as a breaking change in the 3.2.0 release notes (issue #3316).

While the plot may have worked for you, it was using code whose behavior was undefined. To fix your plot, you'll have to define a group aesthetic that has a unique value for each boxplot that should be drawn.

[ovvldc]

Problem is that the error message is very unclear and misleading, as I clearly did set a group = in the code, and the release notes also do not specify what stopped working or how the input is supposed to be given now.

[clauswilke]

The error message states exactly what the problem is: "Can't draw more than one boxplot per group." You will have to assign a grouping variable that has a unique value for each boxplot you want to see drawn. If you're not sure what that means or how to achieve this, I suggest you ask over on the RStudio forums or on Stackoverflow.

[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/