On Thu, Mar 12, 2009 at 5:37 PM, Christopher David Desjardins
<cddesjard...@gmail.com> wrote:
> I get the following error when I run qplot()
>
> qplot(grade, read,data = hhm.long.m, geom = c("point", "smooth"))
>
> Error in smooth.construct.cr.smooth.spec(object, data, knots) :
> x has insufficient unique values to support 10 knots: reduce k.
>
> I am not sure how to tackle this problem. When I take a subsample (< 1000)
> than I am able to run that function but with my sample of ~ 40,000 qplot
> gives me that error. I have 6 grades.
You have 6 values on the x-axis? Maybe you want to just calculate the
mean at each grade. If so, see
http://had.co.nz/ggplot2/stat_summary.html
Hadley
--
http://had.co.nz/
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