Changelog

statisticalRoughness 0.3

New features

• The following functions were added to compute the height-height correlation function:
  • get_hhcf()
• The following functions were added to compute roughness exponents:
  • get_alpha()
  • alpha_plot()
  • filter_alpha()
  • summarise_alpha()
  • get_all_alpha()
• The following functions were added to compute anisotropy exponents:
  • get_zeta()
• Some convenience functions:
  • signifNA() to better handle piping into signif() in vignettes

Enhancements

• added one vignette describing the derivation of roughness and anisotropy exponents
• added one vignette comparing derivations of roughness and anisotropy exponents in three constrasting landscapes

statisticalRoughness 0.2

New features

• The following functions were added to allow a 2D Fourier analysis of topography:
  • detrend_dem()
  • pad_mat()
  • Hann2D()
  • fft2D()
• The following functions were added to rotate raster according to a 2D Fourier analysis:
  • bin()
  • get_normalized_spectral_power_matrix()
  • filter_spectral_power_matrix()
  • get_fourier_angle()
  • rotate_raster()
• Some visualization functions:
  • view_matrix()
  • spectrum_plot()

Enhancements

• re-organized the Reference and the Articles
• added one vignette describing the basic use of Fourier analysis functions
• added one vignette describing how to rotate rasters along 2DFT main components

statisticalRoughness 0.1

Initial release.

• Contains the following functions
  • all_rasters_to_polygons()
  • compute_Hurst_rasters()
  • compute_Hurst_rasters_internal()
  • get_mean_res()
  • get_mean_sd_rasters()
  • merge_Hurst_rasters()
  • get_all_R_L()
  • get_factors()