ic-usage/preprocessing/normalisation/ title=Normalisation class=dd-item><a href=../../../basic-usage/preprocessing/normalisation/>Normalisation</a></li></ul></li><li data-nav-id=/basic-usage/spectral-representation/ title="Spectral Representation" class=dd-item><a href=../../../basic-usage/spectral-representation/>Spectral Representation</a></li><li data-nav-id=/basic-usage/multivariate/ title="Multivariate analysis" class=dd-item><a href=../../../basic-usage/multivariate/>Multivariate analysis</a><ul><li d