using layout() in R

Question

I'm kind of newbie in R and I'm trying to figure out how to use layout to plot my 2 ggplots next to each other with the help of multiplot as well

Given 2 scaterplots:

p1 <- ggplot(mtcars, aes(wt, mpg))
p1 + geom_point()

p2 <- ggplot(mtcars, aes(wt, mpg))
p2 + geom_point()

y-axis are the same on both plots and it's of high importance to be in parallel. How can I produce the following layout:

-----------------------------
|         |                 |
|         |                 |
| p1      |     p2          |
|         |                 |
|         |                 |
|         |                 |
-----------------------------

Answer 1

I don't use multiplot, but you can do this with gridExtra and the command grid.arrange using a custom layout_matrix. You can learn more about grid.arrange here.

EDIT: I'd listen to the creator of the package and use widths. If you get more complex later on use layout_matrix

library(ggplot2)
library(gridExtra)

p1 <- ggplot(mtcars, aes(wt, mpg)) + geom_point()

p2 <- ggplot(mtcars, aes(wt, mpg)) + geom_point()

grid.arrange(p1,p2, widths = c(1,2))