The PLS model space revisited

Abstract Pell, Ramos and Manne (PRM) in a recent article in this journal claim that the ‘conventional’ PLS algorithm with orthogonal scores has an inherent inconsistency in that it uses different model spaces for calculating the prediction model coefficients and for calculating the X ‐space model and it's residuals [1]. We disagree with PRM. All PLS model scores, residuals, coefficients, etc., obtained by the conventional PLS algorithm do come …