Change point shapes in plot of AMCEs or MMs

[miaicosta]

Please specify whether your issue is about:

• [x ] a possible bug
• a question about package functionality
• a suggested code or documentation change, improvement to the code, or feature request

Hi Thomas: As mentioned, I'm having trouble manually changing the shapes of points when plotting marginal means or AMCEs. Note that using scale_colour_manual() works but scale_shape_manual() is ignored.

library("cregg")

data("immigration")

mm_by <- cj(immigration, ChosenImmigrant ~ Gender + Education + LanguageSkills, id = ~CaseID, estimate = "mm", by = ~contest_no)

plot(mm_by, group = "contest_no", vline = 0.5) + scale_shape_manual(values=c(1, 2, 3, 4, 5)) + scale_colour_manual(values=c("red", "blue", "green", "purple", "black"))

[leeper]

So this isn't a bug but we should definitely make it clearer how to do this. It requires mapping the grouping variable to shape via aes():

plot(mm_by, group = "contest_no", vline = 0.5) + 
  scale_shape_manual(values=c(1, 2, 3, 4, 5)) +
  scale_colour_manual(values=c("red", "blue", "green", "purple", "black")) + 
  aes(shape = contest_no)

[miaicosta]

Ah, of course - that makes sense. Thank you!

[leeper]

Closed by 0afd299