Changes in version 0.2.1 (2025-10-01)                  

Bug fixes

  - Several plotting routines used the function expression() as a text
    label in ggplot. This is not allowed and was historically possible
    in older versions of ggplot2 only by accident. It has been replaced
    by using a regular character vector and parse=T.

  - Missing package anchors were added to Rd \link{} targets in the
    documentations.

                 Changes in version 0.2.0 (2022-10-29)                  

New features

  - New plotting functions: circular boxplots with plot_joint_box() and
    circular histograms with plot_circ_hist().

  - New functions to assess the goodness of fit of copulas.
    
      - cramer_vonmises() calculates the Cramér-von-Mises criterion and
        the associated p-value to compare a parametric copula to the
        empirical copula of the data.
      - wasserstein() calculates the Wasserstein distance between two
        copula PDFs or between a copula PDF and pseudo-observations.

  - New functions for density, distribution, quantiles and random number
    generation of linear mixture distributions with an arbitrary number
    of components.
    
      - Mixed Weibull dweibullmix(), pweibullmix(), qweibullmix(), and
        rweibullmix().
      - Mixed gamma dgammamix(), pgammamix(), qgammamix(), and
        rgammamix().
      - Mixed normal dnormmix(), pnormmix(), qnormmix(), and rnormmix().
      - Mixed log-normal dlnormmix(), plnormmix(), qlnormmix(), and
        rlnormmix().

  - New functions for density, distribution, quantiles and random number
    generation of von Mises mixture distributions with an arbitrary
    number of components: dvonmisesmix(), pvonmisesmix(),
    qvonmisesmix(), and rvonmisesmix(). qvonmisesmix() replaces the
    function qmixedvonmises(), which is deprecated.

  - New functions to calculate density and distribution and to generate
    samples of bivariate joint distributions that are defined in terms
    of two marginal distributions and a copula: djoint(), pjoint(), and
    rjoint().

  - New function to obtain trajectories from x- and y-coordinates,
    traj_get()

Enhancement

  - New checking routines that check every argument of every function
    for validity.

  - The plotting functions have new names and added and changed
    functionalities. The old functions are deprecated.
    
      - traj_plot() is now plot_track(). It can now plot multiple
        trajectories and also separate x- and y-coordinates.
      - scat_plot() is now plot_joint_scat(). It can take custom kernel
        density estimates for the margins as input and the plots have an
        improved appearance. It can now take as input trajectories as
        well as separate angles and step lengths
      - cop_scat_plot() is now plot_cop_scat(). It has new input
        arguments but with the same functionalities.
      - circ_plot is now plot_joint_circ(). It can now take as input
        trajectories as well as separate angles and step lengths.
      - cop_plot is now plot_cop_surf().
    
      - make_traj() (deprecated) is now called traj_sim(). It can now
        take as argument directly the output of fit_steplength() or
        fit_angle().

  - The performance of many density, distribution, quantile and random
    number generating functions is now improved. Especially for copulas
    of classes cyl_vonmises and cyl_rect_combine and cyl_cubsec.

  - The names of the arguments of opt_lin_bw() and opt_circ_bw(), have
    changed and are now more intuitive.

Bug fixes

  - mi_cyl() gives now exactly 1 for copulas with perfect correlation if
    normalize=TRUE and symmetrize=TRUE are selected.

  - rdens() (random number generation from kernel density estimates) now
    works correctly with circular density estimates.

  - fit_angle() and fit_steplength() now work correctly with all
    possible parametric distributions and return the correct
    distribution names.

  - When you plot a copula using plot() and provide additional arguments
    that go to the generic plotting function base::plot() there was an
    error that is now fixed.

                 Changes in version 0.1.0 (2021-08-06)                  

First public release.