Pentti Paatero

Positive matrix factorization: A non‐negative factor model with optimal utilization of error estimates of data values

Abstract A new variant ‘PMF’ of factor analysis is described. It is assumed that X is a matrix of observed data and σ is the known matrix of standard deviations of elements of X...

Analysis of different modes of factor analysis as least squares fit problems

Analysis of daily precipitation data by positive matrix factorization

Abstract A new factor analysis method called positive matrix factorization (PMF) has been applied to daily precipitation data from four Finnish EMEP stations. The aim of the ana...

Matrix factorization methods for analysing diffusion battery data