terminatedKnotPoints

Ensure each knot vector has S+1 repeated knots at its boundaries.

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Declaration

 knotPoints = terminatedKnotPoints(knotPoints, S)

Parameters

• knotPoints knot vector in 1-D or cell array of knot vectors
• S spline degree scalar or vector with one entry per dimension

Returns

• knotPoints terminated knot sequence

Discussion

Use this helper when you want to terminate a manually supplied knot sequence before fitting. In 1-D it accepts a numeric knot vector; in higher dimensions it accepts a cell array with one knot vector per dimension.

This operation increases the multiplicity of the first and last knot values to S+1, which makes the spline basis terminate at the grid endpoints.

  knotPoints = ConstrainedSpline.terminatedKnotPoints(knotPoints, 3);