[R] How to add a top level title to multiple plots

[Peter Ehlers]

Jason Rupert wrote:
> How can I add an overall plot title to these four plots? 
> 
> I would like to have something that says, "Distribution Comparisons":
> 
title("Distribution Comparisons", outer = TRUE)

But you may have to make room for it with par(oma=...).

  -Peter Ehlers

> 
> par(mfrow = c(2, 2))
> # Plot 1
> plot(rnorm(10),type="l",col="red")
> title(main = list(paste("Normal"),
>                           col="black", cex = 1.0))
> 
> 
> # Plot 2
> plot(rpois(10, 4),type="l",col="blue")
> title(main = list(paste("Poison"),
>                           col="black", cex = 1.0))
> 
> 
> # Plot 3
> plot(rnbinom(10, mu = 4, size = 100),type="l",col="green")
> title(main = list(paste("Binomial"),
>                           col="black", cex = 1.0))
> 
> # Plot 4
> plot(runif(10),type="l",col="black")
> title(main = list(paste("Uniform"),
>                           col="black", cex = 1.0))
> 
> 
> Thanks again for any feedback and insights. 
> 
> 
> 
> 
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