constraints: Define constraints for optimization of warping functions
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constraints

R Documentation

Define constraints for optimization of warping functions

Constraints ensure monotonicity of spline coefficients for warping functions for use with constrOptim() function.

constraints(Kh, t_min = 0, t_max = 1, warping = "nonparametric")

`Kh`	Number of B-spline basis functions used to estimate warping functions h.
`t_min`	Minimum value to be evaluated on the time domain.
`t_max`	Maximum value to be evaluated on the time domain.
`warping`	If `nonparametric` (default), inverse warping functions are estimated nonparametrically. If `piecewise_linear2` they follow a piecewise linear function with 2 knots.