[R] quantcut

[Prof Brian Ripley]

On Mon, 3 Nov 2008, Kåre Edvardsen wrote:

> I'm trying to devide x into tertiles, but ends up with integer limits
> even x holds one decimal. The analysis is extremely sensitive to the

Do you mean integer character representations in the labels?  See ?cut and 
argument 'dig.lab'.  What you actually got was the 3 significant digits 
(rather than integers) which you asked for.  (*In the labels*, not the 
actual values used.)

> limits and I like to keep them right. How can that be done?
>
> quartiles <- quantcut( x[x >= 0], q=seq(0,1, by=(1/3))
>> table(quartiles)
> quartiles
> [180,344] (344,448] (448,644]
>    16467     16476     16452
>
>
> 	[[alternative HTML version deleted]]

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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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