[R] qqnorm & huge datasets

[peter dalgaard]

On Dec 21, 2011, at 23:10 , Sam Steingold wrote:

> Hi,
> When qqnorm on a vector of length 10M+ I get a huge pdf file which
> cannot be loaded by acroread or evince.
> Any suggestions? (apart from sampling the data).

Sample intelligently? Things like

> qq <- seq(-4,4,,10001)
> qqplot(qq,quantile(x,pnorm(qq)),type="l")

or maybe

> qqnorm(sort(x)[seq_along(x)%%100==50], type="l")

(Those can likely be improved upon, but you get the picture.)


> Thanks.
> -- 
> Sam Steingold (http://sds.podval.org/) on Ubuntu 11.10 (oneiric) X 11.0.11004000
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Peter Dalgaard, Professor,
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