Changes in version 0.4.3 changes - change of maintenance Changes in version 0.4.2 (2025-04-15) changes - fix Rd cross-references Changes in version 0.4.1 (2021-06-19) changes - fix bug in computation of FPCs using FAMM approach when N_B is zero Changes in version 0.4.0 (2021-01-17) changes - add option to allow for nested model structure - add option to allow skew-symmetric and cylcic smooths Changes in version 0.3.1 (2020-09-11) changes - depend on higher version of refund Changes in version 0.2.2 (2018-04-01) changes - replace rBind and cBind by rbind and cbind as they are depricated. Changes in version 0.2.1 changes - fix for triangular covariance estimation; only use products \tilde{y}{ij}\tilde{y}{i^\prime j^\prime} with t_{ij} \leq t_{i^\prime j^\prime} when i \leq i^\prime and with t_{ij} < t_{i^\prime j^\prime} otherwise.