glcm (version 0.2)

calc_texture: Calculates a glcm texture for use in the glcm.R script

Description

This function is called by the glcm function. It is not intended to be used directly.

Usage

calc_texture(rast, n_grey, window_dims, shift, statistics, na_opt, na_val)

Arguments

rast

a matrix containing the pixels to be used in the texture calculation

n_grey

number of grey levels to use in texture calculation

window_dims

2 element list with row and column dimensions of the texture window

shift

a length 2 vector with the number of cells to shift when computing co-ocurrency matrices

statistics

a list of strings naming the texture statistics to calculate

na_opt

one of "ignore", "center", or "any"

na_val

what value to use to fill missing values on edges or where necessary due to chosen na_opt value

Value

• a list of length equal to the length of the statistics input parameter, containing the selected textures measures