Changes in version 2.0.1 (2022-02-17) - Corrected error in computing distortion index for dependent variable. - Corrected error when computing angle for Euclidean transformation and first beta coefficients in negative. Changes in version 2.0.0 (2018-05-16) Added lm2 S3-class to implement an interface consistent with that of R in general and of lm in particular.