A while ago I asked this question about combining a ggplot legend with a table in R to make the legend a bit more informative. The answers were very helpful and I had been using the accepted solution with no issues until recently. Now, I've tried applying that approach to a slightly modified script and for some reason I am getting an unexpected white rectangle on top of the legend. Essentially, I make a tableGrob from a table and position it so that it is next to the ggplot legend so that they appear to be the same element. There is some other formatting that I've omitted for clarity. I've posted some example images below:
For the life of me, I cannot figure out why that rectangle is there or how to remove it. Any insight would be much appreciated.
Code:
library(dplyr)
library(ggplot2)
library(gridExtra)
library(grid)
library(patchwork)
#Data
fullData <- structure(list(error = c(0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4,
5, 6, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4, 5, 6, 0, 1, 2, 3, 4,
5, 6), prob.ed = c(0.005, 0.041, 0.298, 0.753, 0.966, 0.998,
0.999, 0.005, 0.091, 0.598, 0.949, 0.997, 0.998, 0.999, 0.005,
0.091, 0.598, 0.949, 0.997, 0.998, 0.999, 0.007, 0.261, 0.875,
0.996, 1, 1, 1, 0.038, 0.568, 0.983, 1, 1, 1, 1), prob.fr = c(0.005,
0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005,
0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 0.005,
0.005, 0.005, 0.007, 0.007, 0.007, 0.007, 0.007, 0.007, 0.007,
0.038, 0.038, 0.038, 0.038, 0.038, 0.038, 0.038), N = c(2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2), rules = c("13SD", "13SD",
"13SD", "13SD", "13SD", "13SD", "13SD", "13SD-22SD", "13SD-22SD",
"13SD-22SD", "13SD-22SD", "13SD-22SD", "13SD-22SD", "13SD-22SD",
"13SD-22SD-R4SD", "13SD-22SD-R4SD", "13SD-22SD-R4SD", "13SD-22SD-R4SD",
"13SD-22SD-R4SD", "13SD-22SD-R4SD", "13SD-22SD-R4SD", "13SD-22SD-R4SD-41SD",
"13SD-22SD-R4SD-41SD", "13SD-22SD-R4SD-41SD", "13SD-22SD-R4SD-41SD",
"13SD-22SD-R4SD-41SD", "13SD-22SD-R4SD-41SD", "13SD-22SD-R4SD-41SD",
"13SD-22SD-R4SD-41SD-Xbar", "13SD-22SD-R4SD-41SD-Xbar", "13SD-22SD-R4SD-41SD-Xbar",
"13SD-22SD-R4SD-41SD-Xbar", "13SD-22SD-R4SD-41SD-Xbar", "13SD-22SD-R4SD-41SD-Xbar",
"13SD-22SD-R4SD-41SD-Xbar")), row.names = c(NA, -35L), class = "data.frame")
#Table for tableGrob
critTable <- structure(list(error = c(7, 7, 7, 7, 7), prob.ed = c(0.192, 0.456,
0.456, 0.77, 0.962), prob.fr = c(0.005, 0.005, 0.005, 0.007,
0.038), N = c(2, 2, 2, 2, 2), rules = c("13SD", "13SD-22SD",
"13SD-22SD-R4SD", "13SD-22SD-R4SD-41SD", "13SD-22SD-R4SD-41SD-Xbar"
)), row.names = c(NA, -5L), class = "data.frame")
#ggplot
plot <- plot <- ggplot(fullData, aes(x = error, y = prob.ed, group = rules, colour = as.factor(rules))) +
geom_vline(xintercept = 1.75, colour = "red", linetype = "dashed") +
geom_hline(yintercept = 0.90, linetype = "dashed") +
geom_line(data = full.data %>%
group_by(rules) %>%
do({tibble(error = seq(min(.$error), max(.$error),length.out=100),
prob.ed = pchip(.$error, .$prob.ed, error))}),
size = 1) +
scale_x_continuous(labels = full.data$error, breaks = full.data$error, expand = c(0, 0.05)) +
scale_y_continuous(expand = expansion(add = c(0.01, 0.01))) +
scale_color_brewer(palette = "Dark2") +
theme_bw() +
theme(
legend.position=c(0.93,0.2075),
legend.title=element_blank(),
legend.background = element_blank(),
legend.key.size = unit(0.687, "cm"),
legend.text = element_text(size = 12))
#tableGrob
table <- tableGrob(critTable %>%
select(prob.fr,
prob.ed,) %>%
rename(`Prb FR` = prob.fr,
`Prb ED` = prob.ed) %>%
mutate(Rules = ""),
rows = NULL,
theme = ttheme_minimal())
#ggplot + tableGrob
plot <- plot + inset_element(table,
left = 0.65, bottom = 0.2, right = 0.9, top = .3, align_to = 'full')
