Hi, We are trying to classify atmospheric patterns using PCA and kmeans. In T-mode, the (non-normalized) loadings of the PCs are used as input variables for the k-means classification. As first step we perform PCA using "princomp" but the computed loadings produced by princomp are normalized. In order to apply T-mode classification, we need the "non-normalized" loadings as they represent the correlation between old and new "axis". How do we get the "non-normalized" loadings for the Principal Components? Thanks for your help, V?ctor. -- ----------------------------------------------------------------------- V?ctor Homar Santaner Grup de Meteorologia Edif. Mateu Orfila Tel: +34 971 17 1376 Universitat de les Illes Balears Fax: +34 971 17 3426 07122 Palma de Mallorca (SPAIN) Email: Victor.Homar at uib.es Knowledge is contagious. Infect truth.