ggplot2: Define plot layout with grid.arrange() as argument of do.call()

Question

I want to obtained an unbalanced grid of plots such as

require(ggplot2)
require(gridExtra)

df <- data.frame(value1 = rnorm(200),
                 value2          


        

Answer 1

You can now do,

grid.arrange(p1,p2,p3,p4, layout_matrix = rbind(c(1,1,1),c(2,3,4)))