Changelog

Source: NEWS.md

tidyspec 0.3.0

New Features

Spectral Interpolation Functions

• Added spec_interpolate_left() for interpolating spectral data to match reference wavenumber grids (left join style)
• Added spec_interpolate_right() for combining datasets with interpolated reference data (right join style)
• Added spec_interpolate_regular() for creating regular wavenumber grids with specified resolution
• Support for multiple interpolation methods:
  • "linear" - Linear interpolation (base R)
  • "pchip" - Piecewise Cubic Hermite Interpolating Polynomial (requires pracma)
  • "spline" - Cubic spline interpolation (base R)
  • "akima" - Akima spline interpolation (requires akima)
• Optional extrapolation control with extrapolate parameter
• Automatic handling of overlapping column names with customizable suffixes
• Consistent integration with tidyspec environment for automatic wavenumber column detection

Dependencies

• Added pracma and akima to Suggests for advanced interpolation methods
• Functions gracefully handle missing optional dependencies with informative error messages

Documentation

• Comprehensive documentation for all interpolation functions with usage examples
• Clear explanation of join-style behavior for spectral data alignment

tidyspec 0.2.0

New Features

Baseline Correction Functions

• Added spec_blc_rubberband() function for rubberband baseline correction of spectral data
• Added spec_bl_rubberband() function to extract rubberband baseline from spectral data
• Rubberband method provides automatic baseline correction by connecting local minima points
• Both functions support customizable segment length and baseline smoothing options

Improvements

• Enhanced baseline correction options with rubberband algorithm alongside existing rolling ball method
• Consistent API design between rolling ball and rubberband baseline functions

Documentation

• Added a NEWS.md file to track changes to the package