Saving grid.arrange() plot to file

I am trying to plot multiple plots using ggplot2, arranging them using grid.arrange().
Since I managed to find someone describing the exact problem I have, I have quoted from the problem description …

How to get help in R?

What is the possible documentation available for R package? For example I try to understand sp package.

In addition to help(sp), what are the other functions for searching through help and …

Importing data from a JSON file into R

Is there a way to import data from a JSON file into R? More specifically, the file is an array of JSON objects with string fields, objects, and arrays. The RJSON Package isn’t very clear on how to …