NEWS.md

In hrvg/statisticalRoughness: Estimation of roughness exponents across scale for large areas

statisticalRoughness 0.4

New features

• The following functions were added to compute the height-height correlation function, roughness exponents and anisotropy exponents, and power spectrum decay slope:
  • get_hhcf()_: based on the auto-covariance function
  • get_alpha()_: using the auto-correlation length as break point (instead of a bootstrapped segmented regression)
  • get_all_alpha()_: wrapper around get_alpha_()
  • get_beta(): still uses a bootstrapped segmented regression but is only performed once per tile
• The following wrapper functions were added:
  • get_zeta_df()
  • get_zeta_raster()
• The following functions were added for loading and visualizing the results:
  • clamp_raster_sigmas()
  • crossscale_correlations()
  • four_values_check()
  • get_kruskal_flag()
  • make_all_plots()
  • make_angular()
  • make_leaflet_map()
  • make_stacked_density_plot()
  • modes_from_stacked_density()
  • raster_select()
  • read_zeta_raster()
  • reduce_spatial_noise()
  • slice_clamp()

Deprecation

The following functions are not used anymore: + get_hhcf() + get_alpha() + get_all_alpha()

• The following functions were modified

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()

hrvg/statisticalRoughness documentation built on March 12, 2021, 4:55 p.m.