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import none from "./none.js"; | |
export default function(series, order) { | |
if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return; | |
for (var y = 0, j = 1, s0, m, n; j < m; ++j) { | |
for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) { | |
var si = series[order[i]], | |
sij0 = si[j][1] || 0, | |
sij1 = si[j - 1][1] || 0, | |
s3 = (sij0 - sij1) / 2; | |
for (var k = 0; k < i; ++k) { | |
var sk = series[order[k]], | |
skj0 = sk[j][1] || 0, | |
skj1 = sk[j - 1][1] || 0; | |
s3 += skj0 - skj1; | |
} | |
s1 += sij0, s2 += s3 * sij0; | |
} | |
s0[j - 1][1] += s0[j - 1][0] = y; | |
if (s1) y -= s2 / s1; | |
} | |
s0[j - 1][1] += s0[j - 1][0] = y; | |
none(series, order); | |
} | |