Feature request: annotate horizontal geoms

[thomasjwood]

wonderful package--you've address a huge lacunae in the ggplot ecosystem!

I wonder if you've thought about something which is a pretty natural extension--annotating comparable horizontal geoms? for instance:

library(ggplot2)
library(ggsignif)
library(ggstance)

ggplot(iris, aes(y=Species, x=Sepal.Length)) +
  geom_boxploth() +
  geom_signif(comparisons = list(c("versicolor", "virginica")), 
          map_signif_level=TRUE)

results in

Warning messages:
1: In f(..., self = self) : NAs introduced by coercion
2: Computation failed in `stat_signif()`:
missing value where TRUE/FALSE needed 

[const-ae]

Thanks, I am happy to hear that you like the package.

Yes, you are right it would be a natural extension to enable support for horizontal comparisons, but unfortunately I am quite busy right now and don't have the time to add that feature myself.

Of course I would be very happy to accept a pull request and provide help if somebody wants to try.

[IndrajeetPatil]

A workaround is to use coord_flip() instead of using ggstance:

library(ggplot2)
library(ggsignif)

ggplot(mpg, aes(class, hwy)) +
  geom_boxplot() +
  geom_signif(comparisons = list(c("compact", "pickup"),
                                 c("subcompact", "suv"))) +
  coord_flip()
#> Warning in wilcox.test.default(c(29, 29, 31, 30, 26, 26, 27, 26, 25, 28, :
#> cannot compute exact p-value with ties

^{Created on 2021-01-13 by the reprex package (v0.3.0)}

At any rate, ggstance is not supposed to be used any more: https://github.com/lionel-/ggstance