Changes in version 1.1.0                        

New features

  - Box constraints: GetAlgoParams gains lower and upper parameters for
    per-parameter bounds. Enforced via bounds_type = "reflect" (default,
    mirrors proposals back across boundary) or "clip" (truncates to
    boundary).
  - Warm start: optim_SQGDE gains warm_start parameter. Pass the output
    of a previous run to seed the population and continue optimization
    without re-initializing.
  - Disk recovery: GetAlgoParams gains recovery_path (.rds file path)
    and recovery_freq (save interval in iterations). Partial results are
    written to disk periodically via saveRDS, surviving interrupts and
    OOM crashes. Load with readRDS(recovery_path).
  - Progress message control: GetAlgoParams gains trace_print_freq. Set
    to an integer to print progress every N iterations, or Inf to
    suppress all iteration messages.
  - Unified adaptation schemes: rand, current, and best DE schemes are
    now selected via adapt_scheme in GetAlgoParams rather than separate
    internal functions.
  - crossover_rate = 0: Now accepted; selects exactly one random
    parameter to update per iteration.
  - jitter_size = 0: Now accepted; disables jitter noise.
  - Block coordinate updating: GetAlgoParams gains param_block_list, an
    optional list of integer vectors partitioning 1:n_params into
    blocks. The optimizer cycles through blocks in order across
    iterations, updating only the current block's parameters instead of
    using random crossover selection. Useful for high-dimensional
    problems where updating parameter subsets per iteration is more
    efficient.

Bug fixes

  - Fixed division-by-zero in grad_approx_fn when two particles are
    identical or have equal weights (zero-diff guard).
  - Fixed rand scheme incorrectly sampling 2*n_diff parents instead of
    2*n_diff + 1, causing out-of-bounds index access.
  - Fixed runif jitter applied over n_params elements instead of
    length(param_indices) when crossover_rate < 1.
  - Fixed GetAlgoParams validation for n_params, n_particles, and
    n_iter: finiteness is now checked before as.integer() coercion,
    preventing silent NA production and spurious "condition has length
    > 1" errors on vector inputs.

                 Changes in version 1.0.1 (2022-05-10)                  

  - Package uses "message()" instead of "print()" to communicate with
    user.
  - minor fix to documentation.

                        Changes in version 1.0.0                        

  - First public release of package.