nag_2d_spline_ts_eval (e02jec) calculates a vector of values of a spline computed by
nag_2d_spline_fit_ts_scat (e02jdc).
nag_2d_spline_ts_eval (e02jec) calculates values at prescribed points (
,
), for
, of a bivariate spline computed by
nag_2d_spline_fit_ts_scat (e02jdc). It is derived from the TSFIT package of O. Davydov and F. Zeilfelder.
Davydov O and Zeilfelder F (2004) Scattered data fitting by direct extension of local polynomials to bivariate splines Advances in Comp. Math. 21 223–271
nag_2d_spline_ts_eval (e02jec) uses the de Casteljau algorithm and thus is numerically stable. See
Farin and Hansford (2000) for details.
nag_2d_spline_ts_eval (e02jec) is threaded by NAG for parallel execution in multithreaded implementations of the NAG Library.
Please consult the
Users' Note for your implementation for any additional implementation-specific information.
See
Section 10 in nag_2d_spline_fit_ts_scat (e02jdc).