aggregate_spectra       Aggregate data based on grouping variables and
                        a user-provided function
filter_spectra          Filter spectral data frame based on Mahalanobis
                        distance
format_cv               Format multiple trials with or without
                        overlapping genotypes into training and test
                        sets according to user-provided cross
                        validation scheme
ikeogu.2017             Example vis-NIRS and reference dataset
plot_spectra            Plot spectral data, highlighting outliers as
                        identified using Mahalanobis distance
predict_spectra         Use provided model object to predict trait
                        values with input dataset
pretreat_spectra        Pretreat spectral data according to
                        user-designated method
save_model              Save spectral prediction model and model
                        performance statistics
test_spectra            Test the performance of spectral models
train_spectra           Train a model based predict reference values
                        with spectral data
