I created a plot with a custom legend in ggplot2
. I tried to draw a box around all the items in the legend, however I could only draw a box around each individual item. How can I create only one box around all the items?
library(ggplot2)
ggplot(mpg, aes(displ, cty)) +
geom_point(aes(shape = "Data")) +
stat_smooth(aes(linetype = "Regression"), method = "lm",
formula = y ~ x, se = FALSE, colour = 1, size = 0.5) +
scale_shape_manual(values = 1) +
labs(shape = "", linetype = "") +
theme_classic() +
theme(panel.border = element_rect(colour = "black", fill=NA),
aspect.ratio = 1, axis.text = element_text(colour = 1, size = 12),
legend.background = element_rect(linetype = 2, size = 0.5, colour = 1))
It seems that the legend.background
rectangle overlaps the legend.box.background
rectangle. An easy fix is to set legend.background = element_blank()
.
But then, in my opinion, the spacing in the legend is ugly. The legend titles take up too much space even with no title set. Fix this be setting legend.title = element_blank()
. Also the spacing between the two legends is too large. Fix this by setting the space to zero legend.spacing.y = unit(0, "mm")
library(ggplot2)
ggplot(mpg, aes(displ, cty)) +
geom_point(aes(shape = "Data")) +
stat_smooth(aes(linetype = "Regression"), method = "lm",
formula = y ~ x, se = FALSE, colour = 1, size = 0.5) +
scale_shape_manual(values = 1) +
labs(shape = "", linetype = "") +
theme_classic() +
theme(legend.title = element_blank(),
legend.spacing.y = unit(0, "mm"),
panel.border = element_rect(colour = "black", fill=NA),
aspect.ratio = 1, axis.text = element_text(colour = 1, size = 12),
legend.background = element_blank(),
legend.box.background = element_rect(colour = "black"))