Feature request: `axis.ticks` argument in `facet_wrap` and `facet_grid`

[davidhodge931]

In the example below, I'd like to be able to add a axis.ticks argument to remove the non-margin axis ticks but keep the non-margin axis lines

library(tidyverse)
diamonds |>
  ggplot() +
  geom_bar(aes(y = cut), width = 0.75, fill = "steelblue") +
  facet_wrap(~color, axes = "all_y", axis.labels = "margins") +
  theme(axis.line = element_line(colour = "black")) +
  theme(axis.line.x = element_blank()) +
  theme(axis.ticks.x = element_blank())

^{Created on 2024-02-11 with reprex v2.1.0}

[teunbrand]

The axis lines are pretty data agnostic. You could just annotate() a line segment at the corresponding position:

library(ggplot2)

diamonds |>
  ggplot() +
  geom_bar(aes(y = cut), width = 0.75, fill = "steelblue") +
  facet_wrap(~color) +
  annotate(
    "segment", 
    x = -Inf, xend = -Inf, y = -Inf, yend = Inf,
    colour = "black", linewidth = 1
  ) +
  theme(axis.line.x = element_blank()) +
  theme(axis.ticks.x = element_blank())

^{Created on 2024-02-12 with reprex v2.1.0}

[davidhodge931]

It's prob fine, thanks :)

[davidhodge931]

Thinking on this a bit, I actually think it'd be really useful, and I have an idea of how it could work on the surface.

facet_wrap(..., axis.line = NULL, axis.ticks = NULL, ...)
facet_grid(..., axis.line = NULL, axis.ticks = NULL, ...)

Where when NULL, axis.line and axis.ticks inherits from axes

This would enable maximum flexibility in how the internal line/ticks/labels would operate when faceting - i.e. you could do anything without any hacking

[teunbrand]

The facet's role in all this is mostly to confer context to axes about where they are drawn.
I don't think it is the right place to offer this kind of customisation, especially as axes now can draw something totally different than guide_axis().

[sschooler]

As a frequent user of ggplot, this feature would be super useful. It's quite a pain to have to annotate a line, especially when using a categorical axis.

[teunbrand]

Doest the example in #5689 (comment) not work for your case?

[sschooler]

It does, I just ended up doing a geom_hline, but I just wanted to add a note of support to @davidhodge931 that I think it would be useful if it were included in the facet_wrap/facet_grid function. I think it makes sense to put it in there, as there already are the axes and axis.labels arguments.