window_img: nifti image windower

In neurobase: 'Neuroconductor' Base Package with Helper Functions for 'nifti' Objects

nifti image windower

Description

Windows an image to min and max values and also changes cal_max and cal_min parameters

Usage

window_img(
  x,
  window = c(0, 100),
  replace = c("window", "missing", "zero"),
  ...
)

Arguments

x	is either a character name for the image or an object of class nifti
window	numeric of length 2 that gives min and max for window
replace	either "window" if the any values outside of c(min, max) are set to the min or max or "missing" for these to be set to NA
...	not used

Value

Object of class nifti

See Also

readnii

Examples

  set.seed(5)
  dims = rep(10, 3)
  arr = array(rnorm(prod(dims)), dim = dims)
  nim = oro.nifti::nifti(arr)
  window_img(nim, window = c(1, 5))
  window_img(nim, window = c(1, 5), replace = "missing")
  tfile = tempimg(nim)
  window_img(tfile)
  window_img(as.factor(tfile))
  arr = window_img(img_data(nim))
  rnim = RNifti::readNifti(tfile)
  window_img(rnim, window = c(1, 5))
  range(window_img(rnim, window = c(1, 5)))
  window_img(rnim, window = c(1, 5), replace = "missing")
  range(window_img(rnim, window = c(1, 5), replace = "missing"))
   

neurobase documentation built on Oct. 23, 2022, 5:05 p.m.