G_estimate              Estimate covariance of random components G(s1,
                        s2)
G_estimate_randint      Special case of estimating covariance of random
                        components G(s1, s2)
G_generate              Creates the design matrix that allows for
                        estimation of G
all_crossterms          Create crossterms from two matrices
cov_nnls                Estimate non-negative diagonal terms on G
                        matrix
fui                     Fast Univariate Inference for Longitudinal
                        Functional Models
plot_fui                Default FUI plotting
pspline_setting         pspline.setting.R from refund
select_knots            select_knots.R from refund package
unimm                   Fit a univariate mixed model
