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TabFunction: Added comment for quadratic interpolation.

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Matt Spraggs 2015-11-10 12:27:48 +00:00
parent bb044da413
commit 512494aed9
1 changed files with 1 additions and 0 deletions
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lib/TabFunction.cpp
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@ -107,6 +107,7 @@ double TabFunction::operator()(const double *arg) const
xs[2] = next(it)->first; xs[2] = next(it)->first;
ys[2] = next(it)->second; ys[2] = next(it)->second;
// Lagrange polynomial coefficient computation
as[0] as[0]
= (x - xs[1]) / (xs[0] - xs[1]) = (x - xs[1]) / (xs[0] - xs[1])
* (x - xs[2]) / (xs[0] - xs[2]); * (x - xs[2]) / (xs[0] - xs[2]);