Changes in version 0.1.9                        

  - The rbaryGD() function allows arbitrary step-size selection for
    $\alpha \in (0,1]$ provided by a user. Default is $\alpha=1$.

                 Changes in version 0.1.8 (2026-01-11)                  

  - Changed hdist() to histdist() for modality-specific computation.
  - imagebary() added for unregularized Wasserstein barycenter of
    images.
  - imagedist() added for the Wasserstein distance between two images.
  - imageinterp() added for Wasserstein interpolation between two
    images.
  - imagemed() added for unregularized Wasserstein median of images.

                 Changes in version 0.1.7 (2025-12-22)                  

  - Removed dependence on CVXR package.

                        Changes in version 0.1.6                        

  - API references restructured.
  - Added a number of functions for histograms, including distance,
    barycenter, interpolation, and median.
  - Added img2measure() to extract a discrete measure from a gray-scale
    image matrix.
  - New family of routines for Gromov-Wasserstein geometry, gwdist() and
    gwbary(), added.

                 Changes in version 0.1.5 (2025-11-13)                  

  - Replaced lpSolve package's EMD solver with Nicolas Bonneel's
    highly-optimized C library.
  - Added functions for Procrustes-Wasserstein geometry: pwdist() and
    pwbary().

                        Changes in version 0.1.4                        

  - rbarygd() for a Riemannian gradient descent to compute the
    free-support barycenter is added.

                 Changes in version 0.1.3 (2025-05-29)                  

  - Changed the structure of the package.
  - Applied the log-sum-exp trick for numerical stability to the
    entropic regularization solver.
  - rbary23L() added for simple free-support Wasserstein barycenter
    computation.
  - Two ad hoc median routines for images and histograms are removed.

                 Changes in version 0.1.2 (2023-04-11)                  

  - gaussmed1d() and gaussmedpd() now fully respects the product
    manifold perspective.
  - gwdist() added for Sliced-Wasserstein distance computation.

                 Changes in version 0.1.1 (2022-09-03)                  

  - Support for special types of data. See the reference for more
    details.

                 Changes in version 0.1.0 (2020-10-09)                  

  - Added a NEWS.md file to track changes to the package.
  - Initial release.