make one panel blank in ggplot2

Question

p <- ggplot(mtcars, aes(mpg, wt)) 
p + geom_point()+facet_grid(cyl ~ vs)+theme_bw()

Answer 1

You can do that, but not with facet_wrap (as far as I know). Create your seperate sub-plots. For a detailed step by step approach, see my answer here.

Create a blank plot & with the package gridExtra you can combine the plots:

library(gridExtra)
library(grid)

blank <- grid.rect(gp=gpar(col="white"))

grid.arrange(plot1, plot2, blank, plot3, ncol=2)

This approach will give you also a lot influence on the appearance of you final plot (IMHO).