geom_hline and geom_vline about geomtextpath HOT 9 CLOSED

Hi @akarlinsky and thanks for your kind words. We weren't too fussed about creating hline and vline variants because these never need to be curved. However, the direct labelling and broken line aspects might make these useful additions.

You are correct that the approach to this is via geom_textsegment. I have just written the implementation and documentation for geom_texthline and will do the same for geom_textvline.

The current behaviour is:

library(geomtextpath)
#> Loading required package: ggplot2

ggplot(mtcars, aes(mpg, disp)) + 
  geom_point() + 
  geom_texthline(yintercept = 200, label = "Threshold", hjust = 0.8)

^{Created on 2022-01-09 by the reprex package (v2.0.1)}

@teunbrand it is straightforward to implement these, so for completeness I agree that geom_textabline and geom_labelabline should be added too.

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@akarlinsky ghe latest commit includes geom_textvline and geom_labelvline.

So now you can do:

library(geomtextpath)
#> Loading required package: ggplot2

ggplot(mtcars, aes(mpg, disp)) + 
  geom_point() + 
  geom_texthline(yintercept = 200, label = "displacement threshold", 
                 hjust = 0.8, color = "red4") +
  geom_textvline(xintercept = 20, label = "consumption threshold", hjust = 0.8,
                 linetype = 2, vjust = 1.2, color = "blue4")

and

ggplot(mtcars, aes(mpg, disp)) + 
  geom_point() + 
  geom_labelhline(yintercept = 200, label = "displacement threshold", 
                 hjust = 0.8, color = "red4") +
  geom_labelvline(xintercept = 20, label = "consumption threshold", hjust = 0.8,
                 linetype = 2, vjust = 1.4, color = "blue4")

^{Created on 2022-01-09 by the reprex package (v2.0.1)}

from geomtextpath.

For now I've "hacked" it geom_textsegment.
Would you like a contribution of geom_texthline and geom_textvline based on geom_textsegment? I can give it a go :)

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Just making a small note here: if we do this, we might as well do geom_abline().

from geomtextpath.

Amazing! so is this (geom_texthline) already on the current git version?

from geomtextpath.

Yes, @akarlinsky - just reinstall and it's good to go.

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FANTASTIC. You have no idea how useful this is.
It used to be a pain to h/vline and then annotating it accordingly.
From my end I think the issue is closed, I think the new functions should be added to the main README.

Thanks again!

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Thanks for the suggestion @akarlinsky. I have added these geoms to the table in the readme and included the above example too. @teunbrand I'll add the geom_textabline and geom_labelabline over the next couple of days plus some unit tests.

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Nice work Allan, very quick too! I'm not in a hurry with geom_textabline(), take all the time you need :)

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