[R] removing lower and upper quantiles from an arry

[Maas James Dr (MED)]

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 >"
 
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Dr. Jim Maas
University of East Anglia