I am working to get Ari Lamstein's choroplethr R package to allow the specification of arguments including caption from ggplot2:labs(caption = "My caption here")
. caption is failing. Example code:
state_choropleth(df_pop_state,
title = "US 2012 State Population Estimates",
subtitle = "California, Oregon, Washington",
legend = "Population",
caption = "Estimates from the 2012 5-year ACS",
num_colors = 1,
zoom = c("california", "oregon", "washington"))
My current work is in: https://github.com/RickPack/choroplethr
Based on the @include
lines at the top, it appears state_choropleth()
(defined in state.R) uses code in this sequence: (1) choropleth.R, (2) usa.R, (3) state.R.
We see that subtitle() is working but caption is not:
I can easily enough add the caption by adding it a la the ggplot2 graphics of grammar:
state_choropleth(df_pop_state,
title = "US 2012 State Population Estimates",
subtitle = "California, Oregon, Washington",
legend = "Population",
caption = "Estimates from the 2012 5-year ACS",
num_colors = 1,
zoom = c("california", "oregon", "washington")) +
ggplot2::labs(caption = "hi")
However, edits like this to choropleth.R are not working to show the caption when specified as an argument for state_choropleth()
, unlike what worked for subtitle():
ggplot(self$choropleth.df, aes(long, lat, group = group)) +
self$ggplot_polygon +
self$get_scale() +
self$theme_clean() +
ggtitle(self$title, self$subtitle) +
ggplot2::labs(caption = self$caption) +
self$projection
I suppose understanding the indication for the R6 use of self$ would help. I could easily model the existing use of ggtitle(self$title) for subtitle.
I added subtitle = ""
to choropleth.R
to the public list that "make up the public interface of the object" and that worked well. My addition of caption
was apparently not sufficient.
I hope this helps someone familiar with R6 and / or the choroplethr / choroplethrZip packages to help. Thanks!