private void accumSubtreeCoalCountsIntensities(PopsIONode node) {
if (node.lft >= 0) {
accumSubtreeCoalCountsIntensities(pionodes[node.lft]);
accumSubtreeCoalCountsIntensities(pionodes[node.rgt]);
}
int k = node.coalheights.size();
node.coalcount += k;
double[] t = new double[k + 2];
t[0] = node.height;
for (int i = 0; i < k; i++) {
t[i + 1] = node.coalheights.get(i);
}
t[k + 1] = (node.anc < 0) ? piosb.maxGeneTreeHeight() : pionodes[node.anc].height;
int n = node.nlineages;
for (int i = 0; i <= k; i++) {
node.coalintensity += (t[i + 1] - t[i]) * 0.5 * (n - i) * (n - i - 1);
}
}
