scatter plot

Here is a hack

 par(mfrow=c(1,2))

 x  <- rnorm(1000)
 y  <- x + rnorm(1000)
 xp <- (rank(x)-1)/(length(x)-1)

 plot( x, y )
 plot( xp, y )

But do notice that by using percentiles, it spreads the 'x' values
evenly. This may be important for points at the extremes.

Regards, Adai

I'd like to do a simple scatter plot but instead of using the variable 
values on the X axis I would like to plot the percentiles. I searched in 
the manual for percentiles but did not find what I was looking for. I've 
been using SAS for several years but I new to R.