Nothing
# calculates the skew of a distribution for a vector of observations
# (not counts or densities)
skew<-function(x) {
# get rid of NAs, worry about the effects later
x<-x[!is.na(x)]
nx<-length(x)
meanx<-mean(x)
devx<-x-meanx
sampskew<-(sum(devx^3)/nx)/(sum(devx^2)/nx)^1.5
popskew<-sampskew*sqrt(nx*(nx-1))/(nx-2)
return(list(sample=sampskew,population=popskew))
}
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