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


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Brian D. Ripley,                  [EMAIL PROTECTED]
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  • [R] quantcut Kåre Edvardsen
    • Re: [R] quantcut Prof Brian Ripley

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