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Description
The QuadraticSpline
description in the docs now reads:
Splines are a local interpolation method, meaning that the curve in a given spot is only affected by the points nearest to it.
That is true for the dependency of a spline curve on the control points. But for QuadraticSpline
(and CubicSpline
) we do not use the data directly as the control points, but solve for the control points to fit the data. This can lead to non-local influence, case and point:
using DataInterpolations
using Plots
t = 1:10
u = collect(1.0:10)
p = plot()
for u₆ in range(6, 7, length = 10)
u[6] = u₆
A = QuadraticSpline(u, t)
plot!(A)
end
p
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