Calculate normalized difference index (NDI) — calculate_ndi • HSItools

calculate band difference of selected wavelengths.

Usage

calculate_ndi(
  raster,
  ndi_name,
  edges,
  extent = NULL,
  ext = NULL,
  filename = NULL
)

Arguments

raster: terra SpatRaster of normalized capture data.
ndi_name: a character, lower case name of calculated NDI
edges: numeric vector of two for the difference.
extent: an extent or SpatVector used to subset SpatRaster. Defaults to the entire SpatRaster.
ext: character, a graphic format extension.
filename: NULL (default) to write automatically into products, provide full path and ext to override.

Value

one layer terra SpatRaster with calculated NDI values

See also

Other Spectral calculations: calculate_band_difference(), calculate_band_ratio(), calculate_derivative(), calculate_lambdaremp(), calculate_raba(), calculate_rabd(), calculate_rmean()