[R] group by quantiles

[Frank E Harrell Jr]

Daniel Brewer wrote:
> Hello,
> 
> I was just wondering whether there is a quick way to divide a vector of
> data into four groups defined by the quantiles?
> i.e.
> 0-25%
> 25-50%
> 50-75%
> 75-100%
> 
> Many thanks
> 
> Dan
> 

library(Hmisc)
cut2(x, g=4)

-- 
Frank E Harrell Jr   Professor and Chair           School of Medicine
                      Department of Biostatistics   Vanderbilt University