calculate_between_sample_distance
                        Calculate distance between sample data before
                        and after registration
get_approximate_stretch
                        Get approximate stretch factor
get_expression_of_interest
                        Get expression of interest
get_mean_data           Calculate mean expression values from all
                        expression data with replicates
plot_heatmap            Visualise distances between samples from
                        different time points
plot_registration_results
                        Plot gene of interest after registration
scale_and_register_data
                        Register or synchronize different expression
                        profiles
summary_model_comparison
                        Summarise registration results
