GenSamples              Generate some simulation/testing samples with
                        nonlinear truth.
Sieve-package           Nonparametric Estimation by the Method of
                        Sieves
clean_up_result         Clean up the fitted model
create_index_matrix     Create the index matrix for multivariate
                        regression
sieve.sgd.predict       Sieve-SGD makes prediction with new predictors.
sieve.sgd.preprocess    Preprocess the original data for sieve-SGD
                        estimation.
sieve.sgd.solver        Fit sieve-SGD estimators, using progressive
                        validation for hyperparameter tuning.
sieve_predict           Predict the outcome of interest for new samples
sieve_preprocess        Preprocess the original data for sieve
                        estimation.
sieve_solver            Calculate the coefficients for the basis
                        functions
