R help - Dec 2013 - quantiles with approximately the same number of data points within each quantile?

What is a "good" way to create quantiles with approximately the same
number of data points within each quantile?

By default I believe.  See

http://en.wikipedia.org/wiki/Quantile

Others more erudite may correct me.

On Dec 6, 2013, at 11:47 AM, Anika Masters <anika.masters at gmail.com>
wrote:
> What is a "good" way to create quantiles with approximately the
same
> number of data points within each quantile?
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Don McKenzie
Research Ecologist
Pacific Wildland Fire Science Lab
US Forest Service

Affiliate Professor
School of Environmental and Forest Sciences
University of Washington
dmck at uw.edu

Hello,

Use function ?quantile.
See this example, each group has exactly, not approximately, 25 elements.

x <- rnorm(100)

qnt <- quantile(x)
tapply(x, findInterval(x, qnt, rightmost.closed = TRUE), length)

Hope this helps,

Rui Barradas

Em 06-12-2013 19:47, Anika Masters escreveu:
> What is a "good" way to create quantiles with approximately the
same
> number of data points within each quantile?
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>