[R] Fitting a line to a qqplot's points?

[Uwe Ligges]

Paul Lynch wrote:
> I've made some normal plots of my data using qqplot, and now
> I would like to fit a line to the points on the plot and
> check the correlation coefficient to have a more objective measure
> of how straight the line is.  Is there a simple way of doing that?
> (I'm still pretty new to R.)


See ?qqplot and what its value is:

  x <- rnorm(10)
  y <- rnorm(10)
  qq <- qqplot(x, y)
  cor(qq$x, qq$y)

Uwe Ligges



> Thanks,
>    --Paul
>