Changes in version 0.2.0                        

New features

  - New filter_ccma(): Curvature-Corrected Moving Average for 2D/3D
    Cartesian trajectories (Steinecker & Wuensche, 2023). Hanning and
    uniform kernels; padding boundary mode (#11).
  - New filter_na_excursion(): flags multi-frame tracking excursions
    using the criterion from Todd, Kain & de Bivort (2017) — a jump that
    eventually returns counts as an outlier; a sustained shift does not
    (#13).
  - New filter_gaussian(): Gaussian kernel smoother with NA-aware weight
    renormalisation (#1).
  - New filter_triangular(): triangular smoother as two passes of
    filter_rollmean() (#1).

Bug fixes

  - filter_lowpass_fft() / filter_highpass_fft(): fixed an asymmetric
    frequency-domain mask that halved the passband amplitude. Lowpass +
    highpass at the same cutoff now reconstruct the input exactly.
  - filter_na_speed() now flags single-frame outliers correctly (the
    outlier itself is blanked, not its neighbours), and a single NA in
    the input no longer contaminates adjacent rows (#14).
  - filter_aniframe() works on aniframes without an individual column.
    Identity columns now come from variables_what, spatial columns from
    variables_where (#16).
  - find_peaks() / find_troughs(): prominence now matches the documented
    topographic definition (saddle = max of left/right valley min).
    Previously could overestimate prominence and let peaks slip past
    min_prominence.
  - filter_sgolay(): preserve_edges had two bugs and is removed —
    signal::sgolayfilt() already handles edges correctly.
  - filter_kalman() documentation: corrected the default base_Q formula.
  - replace_na_stine() and the inline installer in filter_bandwidth.R
    now point at the current r-universe (#17).

Breaking changes

  - filter_sgolay(): dropped preserve_edges.
  - filter_rollmean() / filter_rollmedian(): dropped ..., gained an
    explicit align argument (#7).

Dependencies

  - data.table (>= 1.18.0) promoted from Suggests to Imports (now backs
    the rolling filters and the LOCF interpolation step).
  - Removed roll, collapse, and animetric.

Internal / housekeeping

  - New helpers ensure_replace_na_args() and ensure_aniframe_spatial()
    replace duplicated input validation across the replace_na_*() and
    filter_na_*() families.
  - check_*() helpers for optional packages consolidated, so the
    canonical r-universe URL lives in a single place.
  - Three dead files removed; future work tracked in #29
    (filter_by_pose) and #30 (an across-style API).
  - Package now at 100% line coverage; covr added to Suggests.

                        Changes in version 0.1.2                        

  - Added a NEWS.md file to track changes to the package.
  - Update to work with tidy movement logic.
  - Use differentiate from animetric for filter_na_speed.
  - filter_na_roi now works with 3D ROIs.