Margin adjustments when using ggplot's geom_tile()
- by chris_dubois
From the documentation for ggplot2's geom_tile() function, we have the following simple plot:
> # Generate data
> pp <- function (n,r=4) {
+ x <- seq(-r*pi, r*pi, len=n)
+ df <- expand.grid(x=x, y=x)
+ df$r <- sqrt(df$x^2 + df$y^2)
+ df$z <- cos(df$r^2)*exp(-df$r/6)
+ df
+ }
> p <- ggplot(pp(20), aes(x=x,y=y))
>
> p + geom_tile()
How do I remove the margins that border the tile?
