Changes in version 1.0-0 (2026-06-05)                  

  - major updates
      - complete rewriting of R code using R6 classes
      - complete rewriting of C++ code using template and OO style
        programming
      - included 'FusedLasso' from the archived package by Holger
        Hoefling (fixed CRAN's complaints)
      - added group-lasso/group-elastic and variants (group penalty:
        l1/l2, l1/linf, cooperative Lasso)
      - added sparse group-lasso/group-elastic and variant (group
        penalty: l1/l2, l1/linf, cooperative Lasso)
      - added lava and/post-lava (combination of sparse and dense
        regularization, Chernozukov et al, 2017)
      - extended to group-lava (group penalty: l1/l2, l1/linf,
        cooperative Lasso)
      - added mcp and scad (concave penalties, Chernozukov et al, 2017)
      - added refit version of Lasso/Elastic-Net ("relaxed" Lasso/Enet)
      - changing many parameters (badly) named, do not expect backward
        compatibility
      - added vignettes
  - minor updates
      - Integration of changes from CRAN versions from 0.2-4 to 0.2-13
      - set up github workflow for pkgdown page
      - various fixes, more testing

                 Changes in version 0.2-4 (2014-01-16)                  

Minor: - memory leak corrected (sp_mat declaration) - linking to
Rcpp/RcppArmadillo headers (requires R 3.0-2)

  - added a 'lasso' function, simple wrapper to the elastic-net
    'function'
  - added computation of degrees of freedom (for elastic net and bounded
    regression)
  - added a method to compute penalized criteria (BIC/AIC) of a
    quadrupen fit, with plot

                 Changes in version 0.2-3 (2013-09-30)                  

  - added back the 'normalize' parameter
  - standardization is performed within the C++ code
  - use of sparse conversion from Matrix to Armadillo
  - corrected bug with the 'intercept' and 'residuals' components of the
    quadrupen class
  - added more tests in the inst directory
  - correction in the documentation
  - added r.squared to the quadrupen class

                 Changes in version 0.2-2 (2013-04-08)                  

  - minor fix to comply with recent ggplot2 updates.

                 Changes in version 0.2-1 (2013-02-27)                  

  - minor fix to pass CRAN check on Windows operating systems.

quadrupen 0.2-0	(2013-02-26)

  - Major updates
      - added bounded regression (regression penalized by infinity norm
        + structured l2 norm)
      - added corresponding features for cross-validation and stability
        path
  - Minor updates
  - corrected wrong annotations of the stability path (PFER)
  - handled normalization internally ('normalize' is no longer a
    parameter)
  - more simple internal handling of penscales and correction of the
    rescaling of the intercept
  - better use of multicore features
  - handled runtime error exception in RcppArmadillo when the system is
    singular (end of the solution path) A consequence is quadrupen is
    less likely to crash due to user's "bad" parametrisation
  - simplification of the C++ code, bugs corrected, probably new ones
    added :-'(
  - added 'examples' and 'tests' directories

                 Changes in version 0.1-0 (2012-10-10)                  

  - first build: structured elastic-net with (weighted) quadratic loss,
    cross-validation and stability selection methods.