merge_pdf: Merge Different Sized Plots
In trinker/plotflow: Tools to Speed Up Workflow Associated with Plotting

Description Usage Arguments Value Note Examples

Allows for merging of different sized R plots.

1	merge_pdf(n.plots, file, widths = 8, heights = 8, n.lines = 1)

`n.plots`	The number of plots to be combined.
`file`	A connection, or a character string naming the file to print to.
`widths`	A vector of widths equal to `n.plots` or a single value that will be used for all plot widths.
`heights`	A vector of heights equal to `n.plots` or a single value that will be used for all plot widths.
`n.lines`	A vector of integer values indicating the number of lines each plotting sequence will take. Default is 1 line each.

Returns a single combined plot of various sizes.

To use with ggplot the plotting sequence must be wrapped with plot().

## Not run: 
merge_pdf(3, file = "foo.pdf", widths = c(7, 7, 10), heights = c(6, 10, 7))
plot(1:10)
plot(1:10, pch=19)
plot(1:10, col="red", pch=19)

library(ggplot2)
p <- ggplot(mtcars, aes(factor(cyl), mpg)) + geom_boxplot()
merge_pdf(2, file = "bar.pdf", widths = c(7, 10), heights = c(6, 10))
plot(1:10)
print(p)

## End(Not run)