have a look at the help page for ?'&', try also this:
i <- 1:20
qs <- quantile(i, c(.25, 0.75))
i[i > qs[1] & i < qs[2]]
I hope it helps.
Best,
Dimitris
On 2/17/2011 11:08 AM, Maas James Dr (MED) wrote:
I'm trying to work out the simplest way to remove the upper and lower
quantiles, in this case upper and lower 25% from an array. I can do it in two
steps but when I try it in one, it fails. Is there something simple missing
from my syntax or are there other simple elegant way to accomplish this?
Thanks
J
i<-1:20
i2<- i[i<quantile(i,.75)]
i3<- i[i>quantile(i,.25)]
i4<- i[quantile(i,.25)< i> quantile(i,.75)]
Error: unexpected '>' in "i4<- i[quantile(i,.25)< i>"
===============================
Dr. Jim Maas
University of East Anglia
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--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
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Fax: +31/(0)10/7043014
Web: http://www.erasmusmc.nl/biostatistiek/
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