All distance matrices are transformed using either principal component
analysis (PCA), multidimensional scaling (MDS) or by calculating the
eigenvectors of the graph Laplacian (Spectral).
The columns of the resulting matrices are then sorted in
descending order by their corresponding eigenvalues.
Usage
transformation(dists, method)
Arguments
dists
distance matrix
method
transformation method: either "pca", "mds", "spectral" or
"spectral_reg", where "spectral_reg" calculates graph Laplacian with
regularization (tau = 1000)