39 lines
1.2 KiB
R
39 lines
1.2 KiB
R
getPopDistancesByKL <- function(adjprior) {
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# Laskee populaatioille etהisyydet
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# kהyttהen KL-divergenssi?
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COUNTS <- COUNTS[seq_len(nrow(adjprior)), seq_len(ncol(adjprior)), ]
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maxnoalle <- size(COUNTS, 1)
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nloci <- size(COUNTS, 2)
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npops <- size(COUNTS, 3)
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distances <- zeros(choose(npops, 2), 1)
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d <- zeros(maxnoalle, nloci, npops)
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prior <- adjprior
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prior[find(prior == 1)] <- 0
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# Lokukset, joissa oli havaittu vain yht?alleelia.
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nollia <- find(all(prior == 0))
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prior[1, nollia] <- 1
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for (pop1 in 1:npops) {
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d[, , pop1] <- (squeeze(COUNTS[, , pop1]) + prior) / repmat(
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sum(squeeze(COUNTS[, , pop1]) + prior), c(maxnoalle, ncol(prior))
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)
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}
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pointer <- 1
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for (pop1 in 1:(npops - 1)) {
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for (pop2 in (pop1 + 1):npops) {
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dist1 <- d[, , pop1]
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dist2 <- d[, , pop2]
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div12 <- sum(sum(dist1 * log2((dist1 + 10^-10) / (dist2 + 10^-10)))) /
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nloci
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div21 <- sum(sum(dist2 * log2((dist2 + 10^-10) / (dist1 + 10^-10)))) /
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nloci
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div <- (div12 + div21) / 2
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distances[pointer] <- div
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pointer <- pointer + 1
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}
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}
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Z <- linkage(t(distances))
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return(list(Z = Z, distances = distances))
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}
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