C_GP                    Active Subspace Matrix closed form expression
                        for a GP.
C_GP_ci                 CI on Eigenvalues via Monte Carlo/GP
C_tr                    Expected variance of trace of C
C_var                   Element-wise Cn+1 variance
C_var2                  Alternative Variance of Update
Lt_GP                   Active Subspace Prewarping
activegp                Package activegp
as.matrix.const_C       Extract Matrix
domain_to_R             Rectangular Domain -> Unbounded Domain
domain_to_unit          Change a function's inputs to live in [-1, 1]
grad_est_subspace       Estimate the Active Subspace of a Cheap
                        Function using Gradients
logLikHessian           Hessian of the log-likelihood with respect to
                        lengthscales hyperparameters Works for homGP
                        and hetGP models from the hetGP package for
                        now.
n11_2_01                f:[-1, 1] -> R Becomes f:[0,1] -> R
plot.const_C            Plot const_C objectc
print.const_C           Print const_C objects
subspace_dist           Get the distance between subspaces defined as
                        the ranges of A and B
update.const_C          C update with new observations
update_C2               Update Constantine's C, using update formula
