Changes in version 1.3.0 (2026-05-09)                  

  - Documentation improvements.

  - Removed renv.

  - Added a safeguard if computation of (numerical) gradient or Hessian
    fails. (#5)

  - Additional arguments passed to optimization methods now go only to
    the objective function. (#1)

                 Changes in version 1.2.1 (2025-06-26)                  

  - Small fixes.

  - Added private helper function .check_arguments_complete() to the
    Objective object. It checks whether all required arguments are
    specified.

  - Added functionality to the Objective object that can compute a
    numerical gradient and Hessian.

                 Changes in version 1.2.0 (2025-04-24)                  

  - Gradient, Hessian, and parameter bounds can now be passed to
    Optimizer objects.

  - The old S3 interface has been removed. The functions
    define_optimizer(), optimizer_nlm(), optimizer_optim(),
    new_optimizer(), validate_optimizer(), and apply_optimizer() are no
    longer available. Please use the R6 interface via Optimizer$new()
    and the corresponding methods. See help("Optimizer", "optimizeR")
    for details.

                 Changes in version 1.1.3 (2025-03-27)                  

  - ParameterSpaces now allows users to specify parameters that are not
    used for transformations. This can be useful when one general
    ParameterSpaces object is defined for nested sets of parameters.

                 Changes in version 1.1.2 (2024-11-27)                  

  - Added the ParameterSpaces R6 object to transform parameters between
    optimization and interpretation space.

                 Changes in version 1.1.1 (2024-06-19)                  

  - The Objective object now allows different output structures for the
    objective function. A template can be provided via the
    $output_template field.

                 Changes in version 1.1.0 (2024-05-27)                  

  - The Optimizer object has a new method optimize, which can be used
    for minimization and maximization by setting the argument direction.

  - In method Objective$initialize(), renamed argument objective to f.

  - In method Objective$initialize(), if target = NULL (the new
    default), the first argument from f is taken as the target argument.

                 Changes in version 1.0.5 (2024-02-28)                  

  - Removed install_optimizer_packages().

                 Changes in version 1.0.4 (2024-02-05)                  

  - Fixed a bug and added test cases for fixed arguments that are NULL.

                 Changes in version 1.0.3 (2024-01-31)                  

  - Fixed a bug in creating the error message for a timeout.

  - Added checks for the objective, initial, and ellipsis arguments of
    the optimizer function.

  - Added a verbose argument to the $get_argument() and
    $remove_argument() methods of the Objective object.

  - Added field fixed_arguments to the Objective object. It returns the
    names of the fixed arguments.

  - Fixed a bug in backward compatibility.

                 Changes in version 1.0.2 (2024-01-14)                  

  - Small bug fixes.

  - Backward compatibility with {optimizeR} version 0.3.3.

                 Changes in version 1.0.1 (2023-11-08)                  

  - Fixed wrong values for "out_value" and "out_parameter" in the
    optimizer dictionary entry for stats::optim.

                 Changes in version 1.0.0 (2023-11-04)                  

  - Instead of using S3 classes, we treat optimizers as R6 objects now.

                 Changes in version 0.3.3 (2023-09-27)                  

  - Removed package start-up message.

  - Added the .direction argument to define_optimizer() to specify
    whether the optimizer minimizes or maximizes.

  - Added a dot before the argument names for define_optimizer() to
    avoid clashes with the ... argument.

  - Removed dependency on {glue}.

  - Used TestFunctions::TF_ackley instead of the package's own
    implementation of the Ackley function for validation.

                 Changes in version 0.3.2 (2023-03-25)                  

  - Added the package logo and created the package website
    (https://loelschlaeger.de/optimizeR) with {pkgdown}. No code
    changes.

                 Changes in version 0.3.1 (2023-03-05)                  

  - In define_optimizer(), now validate = FALSE by default.

                 Changes in version 0.3.0 (2023-01-22)                  

  - Function set_optimizer() was renamed to define_optimizer().

  - Inputs for define_optimizer() were renamed for clarity:
    
      - opt_fun -> optimizer
      - f -> objective
      - p -> initial
      - v -> value
      - z -> parameter
      - out_ign -> output_ignore
      - test_par -> validation_settings

  - Elements for input validation_settings have been simplified. Please
    see the documentation of define_optimizer().

  - Elements in the output of apply_optimizer() were renamed for
    clarity:
    
      - v -> value
      - z -> parameter
      - time -> seconds (now just a numeric)

  - Element initial (the starting parameter vector) was added to the
    output of apply_optimizer().

                 Changes in version 0.2.0 (2022-12-02)                  

  - Some functions were renamed:
    
      - optimizeR() -> apply_optimizer()
      - set_optimizer_nlm() -> optimizer_nlm()
      - set_optimizer_optim() -> optimizer_optim()

  - Functions is_number(), try_silent(), timed(), and do.call_timed()
    are no longer exported.

  - Function try_silent_timed() was removed.

                 Changes in version 0.1.0 (2022-08-23)                  

  - Initial CRAN release.