Calculate Moments of Neighborhood

Source: R/amoment.R

This function calculates Local Moments (mean, standard deviation, skew) for an array.

get_neighbors(
  image,
  window = NULL,
  nvoxels = NULL,
  mask = NULL,
  rm.value = FALSE,
  check.wrap = TRUE,
  rep.value = 0,
  ...
)

Arguments

image

input image
window

window (in width) for the neighborhood
nvoxels

window (in voxels) for the neighborhood 1 results in a 3x3 cube
mask

array or object of class nifti of same size as image
rm.value

remove the voxel itself before taking the moment
check.wrap

Logical - check wrapround and put rep.value in for the wrapped values
rep.value

Replace wrapped values (edge of image) to this value
...

Not used

Value

Array with same dimensions as image

Examples

x = array(rnorm(1000), dim=c(10, 10, 10))
neigh = get_neighbors(x, nvoxels = 1)