`geom_rug()` gives an unhelpful error w/ `coord_radial()`
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Description
data.frame(x = seq(0, 360, 20), y = 1:19) |>
ggplot2::ggplot() +
ggplot2::geom_point(
ggplot2::aes(x = x, y = y)
) +
ggplot2::coord_radial() +
ggplot2::geom_rug(
ggplot2::aes(y = NULL, x = x)
)
Error in `ggplot2::geom_rug()`:
! Problem while converting geom to grob.
ℹ Error occurred in the 2nd layer.
Caused by error in `$<-.data.frame`:
! replacement has 0 rows, data has 19
Run `rlang::last_trace()` to see where the error occurred.
It might make sense for geom_rug() not to work with coord_radial(), but this isn't a helpful error message for a user.
For clarity, I only encountered this when writing a package function that can optionally return a radial plot - I wasn't really after putting a rug on a polar plot. But it was a strange error to debug!
The same code works fine with coord_cartesian().
Cheers!
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Research direction
Start by running the reproducible example with geom_rug() and coord_radial(), then compare it with the coord_cartesian() version. Trace the geom-to-grob conversion to determine whether the combination should be rejected clearly or handled differently; done means the radial example no longer produces an unhelpful error.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- r
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 52/100