Interpolation

interpolate(x, y, BSplineOrder(k))

Interpolate values y at locations x using B-splines of order k.

Grid points x must be real-valued and are assumed to be in increasing order.

Returns a SplineInterpolation which can be evaluated at any intermediate point.

See also interpolate!.

Examples

julia> xs = -1:0.1:1;

julia> ys = cospi.(xs);

julia> itp = interpolate(xs, ys, BSplineOrder(4));

julia> itp(-1)
-1.0

julia> itp(0)
1.0

julia> itp(0.42)
0.2486897676885842

interpolate!(I::SplineInterpolation, y::AbstractVector)

Update spline interpolation with new data.

This function allows to reuse a SplineInterpolation returned by a previous call to interpolate, using new data on the same locations x.

See interpolate for details.

SplineInterpolation

Spline interpolation.

This is the type returned by interpolate. Generally, it should not be directly constructed.

A SplineInterpolation I can be evaluated at any point x using the I(x) syntax.

It can also be updated with new data on the same data points using interpolate!.

spline(I::SplineInterpolation) -> Spline

Returns the Spline associated to the interpolation.