fslr (version 1.0)

fslsub2: Subsample image by factor of 2

Description

This function calls fslmaths -subsamp2 to subsample an image and either saves the image or returns an object of class nifti

Usage

fslsub2(file, outfile = NULL, retimg = FALSE, reorient = FALSE,
  intern = TRUE, ...)

Arguments

file

(character) filename of image to be subsampled

outfile

(character) name of resultant subsampled file

retimg

(logical) return image of class nifti

reorient

(logical) If retimg, should file be reoriented when read in? Passed to readNIfTI.

intern

(logical) pass to system

...

additional arguments passed to readNIfTI.

Value

• character or logical depending on intern

Examples

if (have.fsl()){
system.time({
x = array(rnorm(1e6), dim = c(100, 100, 100))
img = nifti(x, dim= c(100, 100, 100),
datatype = convert.datatype()$FLOAT32, cal.min = min(x),
cal.max = max(x), pixdim = rep(1, 4))
subsamp = fslsub2(img, retimg=TRUE)
print(voxdim(subsamp))
})
}