Multiple Legend Justification

Question

I am trying to justify several legends in ggplot, but without any real success. If the legend is displayed correctly, outside the plot area (gray area). However, when you show the legends inside the plot area, the legends are centered (and I would like them to be left-aligned). I tried to execute this thread , but it still does not work properly.

My example:

library(ggplot2) ggplot(mtcars, aes(wt, mpg)) + geom_point(aes(colour = factor(cyl), size = qsec)) + geom_point(aes(colour = factor(cyl), size = qsec)) + theme(legend.justification = c(1,0), legend.position = c(1,0), legend.margin = unit(0,"lines"), legend.box = "vertical", legend.key.size = unit(1,"lines"), legend.text.align = 0, legend.title.align = 0) 

Answer 1

We need to add legend.box.just = "left" to the existing theme() .

 ggplot(mtcars, aes(wt, mpg)) + geom_point(aes(colour = factor(cyl), size = qsec)) + geom_point(aes(colour = factor(cyl), size = qsec)) + theme(legend.box.just = "left", legend.justification = c(1,0), legend.position = c(1,0), legend.margin = unit(0,"lines"), legend.box = "vertical", legend.key.size = unit(1,"lines"), legend.text.align = 0, legend.title.align = 0) 

Answer 2

You can try the following:

 library(ggplot2) data("mtcars") g <- ggplot(mtcars, aes(wt, mpg)) g <- g + geom_point(aes(colour = factor(cyl), size = qsec)) g <- g + geom_point(aes(colour = factor(cyl), size = qsec)) g <- g + theme(legend.justification=c(0,0), legend.position=c(0,0)) 

For other positions, you can try from this documentation http://www.cookbook-r.com/Graphs/Legends_(ggplot2)/

You will probably find a more detailed explanation in the link above.