pairdiff_madmean        Distance matrix between columns of a matrix
                        using their MAD-trimmed mean differences
pairdiff_mean           Distance matrix between columns of a matrix
                        using their mean differences
pairdiff_median         Distance matrix between columns of a matrix
                        using their trimmed median differences
pairdiff_mode           Distance matrix between columns of a matrix
                        using their mode differences
pairdiff_trimmedmean    Distance matrix between columns of a matrix
                        using their trimmed mean differences
pairscale_madmean       Normalize matrix columns using their
                        MAD-trimmed mean differences
pairscale_mean          Normalize matrix columns using their mean
                        differences
pairscale_median        Normalize matrix columns using their median
                        differences
pairscale_mode          Normalize matrix columns using their mode
                        differences
pairscale_trimmedmean   Normalize matrix columns using their
                        trimmed-mean differences
solve_graph_laplacian   graph Laplacian approach to finding
                        normalization factors
vector_madmean          Compute MAD-trimmed mean value of a vector,
                        with optional filtering for N datapoints
vector_mean             Compute mean value of a vector, with optional
                        filtering for N datapoints
vector_median           Compute median value of a vector, with optional
                        filtering for N datapoints
vector_mode             Compute mode of a vector, with optional
                        filtering for N datapoints
vector_trimmedmean      Compute trimmed mean value of a vector, with
                        optional filtering for N datapoints
