Control graphic parameters

In R, it is also possible to tailor the window layout using the par() function.

To set up a graphical window for multiple charts with nr rows and nc columns, assign the vector c(nr, nc) to the option mfrow. To adjust the size of the margins and characters in the text, set the appropriate decimal value to to the options mex and cex, respectively. Like plot(), each call to par() only implements the parameters in that particular call.

Look at this example:

> # Create 3x1 graphical window
> par(mfrow = c(3, 1))

> # Also reduce margin and character sizes by half
> par(mfrow = c(2, 1), mex = 0.5, cex = 0.5)

After this, you would make two consecutive calls to plot() to add the series in the order that you want them to appear.

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