Changes in version 1.5.9 (2025-05-03)                  

    o   Updating configure.ac.

                        Changes in version 1.5.8                        

    o   Suppressing output for pcal1.

                 Changes in version 1.5.7 (2023-01-18)                  

    o   Adding sharpel1rs for fitting lines with missing data.

    o   Adding sparsel1pca for fitting regularized lines.

                 Changes in version 1.5.6 (2022-01-03)                  

    o   Adding Makefile.ucrt

                 Changes in version 1.5.5 (2021-10-29)                  

    o   Updating configure.ac

                 Changes in version 1.5.4 (2020-02-11)                  

    o   Including stdbool.h

    o   Updating configure.ac

                 Changes in version 1.5.3 (2019-12-19)                  

    o   Changing class() to inherits()

    o   Adding weightedL1Distance.R for weighted L1-norm distances of points to a subspace

                 Changes in version 1.5.2 (2017-07-20)                  

    o   Repairing projection into orthogonal space for SharpEl1-PCA

    o   No longer removing origin points from PCA-L1

    o   Edited man pages

                 Changes in version 1.5.1 (2017-04-10)                  

    o   Updated calculation of L1-norm scores

    o   Edited man pages

                  Changes in version 1.5 (2017-03-09)                   

    o   Added implementation of method SharpEl1-PCA (Brooks and Dula, 2017)

    o   Added implementation of method PCA-Lp (Kwak, 2014)

    o   Updated options for calculating scores and reconstructions (Zhou and Marron, 2016)

                 Changes in version 1.4.1 (2016-12-20)                  

    o   Added DOI numbers for references

    o   Updated implementation of wPCA method (Park and Klabjan, 2016)

                         Changes in version 1.4                         

    o   Added implementation of method L1-PCAhp (Visentin, Prestwich, and Armagan, 2016)

    o   Added implementation of wPCA method (Park and Klabjan, 2016)

                  Changes in version 1.3 (2015-04-25)                   

    o   Updated installation instructions and configure.ac.

    o   Added interface to R's internal random number generator in pcal1.c, pcal1_R.c 

    o   Added support for user-defined starting points in function pcal1 and l1pca

                  Changes in version 1.2 (2012-07-06)                   

    o   Initialized variables in pcal1_R.c, l1pca_R.c, l1pcastar_R.c

                  Changes in version 1.1 (2012-04-23)                   

    o   Removed compiler-dependent flags from configure.ac

                  Changes in version 1.0 (2012-04-20)                   

    o   Initial release