errors using multi plot (ggplot2) and grid.arrange (gridExtra)

Question

I am trying to make a graph with three panels. I am trying to use the functions multi plot (of ggplot2) and grid.arrange of (of gridExtra). None of them work! How could I fix this problem???

multiplot(f1.1,f1.2,f1.3)
Error: could not find function "multiplot"

grid.arrange(f1.1,f1.2,f1.3)
Error: No layers in plot

Answer 1

Might I suggest installing the gridExtra package:

library(gridExtra)
arrangeGrob(f1.1, f1.2, f1.3)