Snippet to assemble ggplot2 plots over several PDF pages with gridExtra

multipageggplot2.R

# Multipage pdf plots with ggplot2

library(ggplot2)  # Load ggplot2 obviously
library(gridExtra)  # Load some extensions to have multiplot pdf

# Simulate data
df = data.frame(x = seq(1:30), y = rnorm(30), z = runif(30, 1, 10))

# Example plots
p.1 = ggplot(df, aes(x = x, y = y)) +
  geom_point()

p.2 = ggplot(df, aes(x = x, y = z)) +
  geom_point()

p.3 = ggplot(df, aes(x = y, y = z)) +
  geom_point()

p.4 = ggplot(df, aes(x = y)) +
  geom_histogram()

plots.list = list(p.1, p.2, p.3, p.4)  # Make a list of plots

# Generate plots to be saved to pdf, warning the argument to marrangeGrob
# have to be passed using do.call
# nrow (ncol) gives the number of rows (columns) of plots per page
# nrow and ncol have to be specificed inside a list
# Here, we'll obtain 2 plots in rows by page
plots = do.call(marrangeGrob, c(plots.list, list(nrow = 2, ncol = 1)))

# To save to file, here on A4 paper
ggsave("multipage_plot.pdf", plots, width = 21, height = 29.7, units = "cm")