# Calculate Surface/Image Texture Indexes

## Documentation for package ‘SurfRough’ version 0.0.1.2

- DESCRIPTION file.
- Package NEWS.

## Help Pages

anisoDir | Calculate the direction of maximum continuity considering 4 directions
anisoDirL | Calculate the direction of maximum continuity considering 4 directions
anisoR | Calculate the index of anisotropy considering the spatial variability along 4 directions
anisoRL | Calculate the index of anisotropy considering the spatial variability along 4 directions
CalcMeans | Calculate the mean of absolute values raised to an exponent found in a search window
CalcMedians | Calculate the median of absolute values found in a search window for each raster in a list
circularDispersionGV | Compute circular variance of aspect (i.e. of the gradient vector)
circularDispersionNV | Compute circular variance of normal vectors to surface
circularEigenNV | Compute circular variance of normal vectors to surface
iqrST | iqrST: interquartile range in a moving window
k05ck2 | basic kernels
k1c | basic kernels
k1ck2 | basic kernels
k1ck4 | basic kernels
k2c | basic kernels
k2ck2 | basic kernels
k4c | basic kernels
k6c | basic kernels
k8c | basic kernels
KernelCircular | Build a circular moving window
KernelRectangular | Build a rectangular kernel of size X x Y
Madscan | Calculate MAD basic indices
MadscanL | Calculate MAD basic indices (version for large files)
Meanscan | Calculate less robust geostatistical indices (mean of absolute differences raised to an exponent)
RRI | RRI: Radial Roughness index
RRI.numeric | RRI: Radial Roughness index
RRI.SpatRaster | RRI: Radial Roughness index
RRIcore | RRIcore: RRI using only the four inner second order directional differences of the RRI kernel
RRIcore.numeric | RRIcore: RRI using only the four inner second order directional differences of the RRI kernel
RRIcore.SpatRaster | RRIcore: RRI using only the four inner second order directional differences of the RRI kernel
RRIK3 | RRIK3: Radial Roughness index with differences of order 3
RRIK3.numeric | RRIK3: Radial Roughness index with differences of order 3
RRIK3.SpatRaster | RRIK3: Radial Roughness index with differences of order 3
RRIk4 | RRIk4: Radial Roughness index with fourth order differences
RRIk4.numeric | RRIk4: Radial Roughness index with fourth order differences
RRIk4.SpatRaster | RRIk4: Radial Roughness index with fourth order differences
RRIMax | RRIMax: Maximum Radial Roughness index
RRIMax.numeric | RRIMax: Maximum Radial Roughness index
RRIMax.SpatRaster | RRIMax: Maximum Radial Roughness index
RRIMin | RRIMin: Minimum Radial Roughness index
RRIMin.numeric | RRIMin: Minimum Radial Roughness index
RRIMin.SpatRaster | RRIMin: Minimum Radial Roughness index
stdST | stdST: standard deviation in a moving window
TRIbi | TRIbi: TRI with bilinear interpolation along diagonals
TRIbi.numeric | TRIbi: TRI with bilinear interpolation along diagonals
TRIbi.SpatRaster | TRIbi: TRI with bilinear interpolation along diagonals
Trik2 | Improved TRI (with differences of order 2), reducing/removing slope dependence (for testing purposes)
Trik2.numeric | Improved TRI (with differences of order 2), reducing/removing slope dependence (for testing purposes)
Trik2.SpatRaster | Improved TRI (with differences of order 2), reducing/removing slope dependence (for testing purposes).