Changes in version 2.1.1 (2020-08-02)                  

  - Use open instead of open.ff for compatibility with ff 4.

                 Changes in version 2.1.0 (2020-05-28)                  

  - Follow [Bioconductor S4 practices][2]. If you have used new() to
    create symDMatrix instances, please use the constructor symDMatrix()
    instead.
  - Update citation instructions.
  - Use inherits(., *) instead of class(.) == * (R4 compat).
  - Replace testthat with tinytest.

                 Changes in version 2.0.2 (2018-08-25)                  

  - Load example symDMatrix readonly in examples to pass CRAN checks.

                 Changes in version 2.0.1 (2018-08-24)                  

  - load.symDMatrix(): Add readonly parameter and suggest to use when
    loading example dataset.

                 Changes in version 2.0.0 (2018-08-07)                  

The symDMatrix package is now based on the [LinkedMatrix][1] package.
The internal structure of a symDMatrix object has changed; therefore,
previous objects need to be regenerated. We apologize for the
inconvenience, but assure you that this change will make the package as
a whole more robust and efficient.

  - The symDMatrix class inherits from RowLinkedMatrix.
  - Only storing the upper triangular matrix resulted in inefficient
    queries as requests to the lower triangle needed to be redirected.
    We now store the whole matrix, but use virtual transposes for the
    lower triangular matrix. Virtual transposes are very efficient as
    the block shares the same memory mapping as the block across the
    diagonal and the indices are rewritten locally.
  - Matrix-like objects that do not support virtual transposes have been
    dropped (i.e., only the ff package is currently left as far as we
    know).
  - as.symDMatrix() has been kept the same, but the S4 constructor has
    changed.

                 Changes in version 1.0.0 (2017-05-08)                  

Initial release.