[R] drawing dot plots with size, shape affecting dot characteristics

[Michael Bedward]

Try running this and see if it does what you want. It just uses plain
old plot with the cex arg for size and the col arg for colour...

greyDots <- function() {
  # make up some data
  x <- runif(50, 0, 10)
  y <- runif(50, 0, 10)
  valueMax <- 100
  value <- sample(valueMax, 50)

  # edit these to taste
  maxDotSize <- 5
  maxGreyLevel <- 0.8

  plot(x, y, pch=16, xlim=c(0,10), ylim=c(0,10),
       cex=maxDotSize * value / valueMax,
       col=grey(maxGreyLevel * value / valueMax))
}


On 12 August 2010 13:14, Brian Tsai <btsai00 at gmail.com> wrote:
> Hi all,
>
> I'm interested in doing a dot plot where *both* the size and color (more
> specifically, shade of grey) change with the associated value.