allow to change the legend text in ppc_intervals() and related functions

[mcol]

These are currently hardcoded as y and yrep, but it may be helpful to provide an easy way to override the defaults.

[tjmahr]

Hmm, we could export our colorizers.

library(bayesplot)
library(ggplot2)

y <- rnorm(50)
yrep <- matrix(rnorm(5000, 0, 2), ncol = 50)

color_scheme_set("darkgray")

ppc_intervals(y, yrep) + 
  bayesplot:::scale_color_ppc_dist(labels = c("no", "yes")) + 
  bayesplot:::scale_fill_ppc_dist(labels = c("no", "yes"))

Or do some kind of scale_color_bayesplot() which wraps scale_color_manual() so that it gets the current bayesplot color-scheme. I think that using a function to customize a plot is better than creating more options for functions to handle.

[jgabry]

@mcol Thanks, yeah I agree this would be nice. @tjmahr Yeah, fully agree. A function for this would be great.

[silberzwiebel]

Looks like a duplicate issue to #75.