geom_dumbbell plot not inheriting aes

Question

I am trying to build a dumbbell plot (geom_dumbbell) in ggplot. The plot builds fine, but when I try and add details around the point color and size the plot fails to inherit aes, spewing:

Error: mapping must be created by aes()

Here is the code to generate a reproducible example:

test <- data.frame(Scenario = rep(c("LC-HD", "HC-HD", "LC-LD", "HC-LD"), times = 2),  
           technology = c("P", "W", "P", "W", "P", "W", "P", "W"),
           country = paste("country", rep(seq(1, 4, by = 1), times = 2)), 
           low = runif(8, min = 1, max = 3), 
           high = runif(8, min = 4, max = 6))

The following code runs fine:

library(ggplot2)
library(ggalt)
ggplot(test, aes(x = low, xend = high, y = country, group = country)) + 
  geom_dumbbell(color="grey", 
                size = 1) + 
  facet_grid(technology ~ Scenario) +
  coord_flip() + 
  theme(axis.text.x = element_text(angle = 90))

However when I make the below changes to the geom_dumbbell layer (setting point colours and sizes):

library(devtools)
library(ggplot2)
library(ggalt)
ggplot(test, aes(x = low, xend = high, y = country, group = country)) + 
  geom_dumbbell(color="grey", 
                size = 1, 
                point.size.l = 1.5, point.size.r = 1,5, 
                point.colour.l = "#58d9ef", point.colour.r = "#a3c4dc") +
  facet_grid(technology ~ Scenario) +
  coord_flip() + 
  theme(axis.text.x = element_text(angle = 90))

I get the error:

Error: mapping must be created by aes()

Even if i try set inherit.aes = T, explicitly in the geom_bumbbell layer, i still get the error.

The problem seems to be with the point.size argument as adding this gives the error. When i just add point.colour arguments, i get:

Warning: Ignoring unknown parameters: point.color.l, point.color.r

This is strange as these are parameters described in the documentation: https://www.rdocumentation.org/packages/SciencesPo/versions/1.4.1/topics/geom_dumbbell

I am running ggalt_0.6.1 (which loads geom_dumbbell)

What am i missing here. Why does adding details on the points change the way aes is inherited, and why aren't point.colour parameters recognized?

One thing you may want to confirm in your question is the version of `geom_dumbell` you are using. — steveb, Aug 27 '18 at 15:57
When asking for help, you should include a simple [reproducible example](https://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example) with sample input and desired output that can be used to test and verify possible solutions. Since we don't have the data in `results` we can't run and test the code to see what's going on. — MrFlick, Aug 27 '18 at 16:02
In your example code you have a comma instead of a period for `point.size.r = 1,5`. Changing that might help — see24, Aug 27 '18 at 17:34
MrFlick, i added code to generate reproducible example. steveb, i added info about running version 0.6.1 of ggalt that loads geom_dumbbell (i think this is what your question was asking, and i think its the latest version). see24, when change the comma to a point (good catch) i get: Warning: Ignoring unknown parameters: point.size.l, point.size.r, point.color.l, point.color.r. Why are these parameters not identified if i am running an up to date version of ggalt (i think)? — MorrisseyJ, Aug 27 '18 at 20:37

score 1 · Accepted Answer · answered Aug 27 '18 at 21:57

Worked this out.

Error: mapping must be created by aes()

Was caused by the comma in point.size.r.

Warning: Ignoring unknown parameters: point.color.l, point.color.r

Was caused by using the wrong names.

Those should be:

point.size.l = size_x
point.size.r = size_xend
point.color.l = colour_x
point.color.r = colour_xend

Solution was here: Ignoring unknown parameters: point.colour.1

Apologies for the confusing question title. I am not sure how one edits the documentation: https://www.rdocumentation.org/packages/SciencesPo/versions/1.4.1/topics/geom_dumbbell

geom_dumbbell plot not inheriting aes

1 Answers1