poistaTyhjatPopulaatiot <- function(npops) {
	# % Poistaa tyhjentyneet populaatiot COUNTS:ista ja
	# % SUMCOUNTS:ista. P�ivitt�� npops:in ja PARTITION:in.
	notEmpty <- find(any(SUMCOUNTS, 2))
	COUNTS <- COUNTS[, , notEmpty]
	SUMCOUNTS <- SUMCOUNTS[notEmpty, ]
	LOGDIFF <- LOGDIFF[, notEmpty]

	for (n in 1:length(notEmpty)) {
		apu <- find(PARTITION == notEmpty(n))
		PARTITION[apu] <- n
	}
	npops <- length(notEmpty)
	return(npops)
}