origin-methods {oro.nifti}

Extract Image Attribute origin

Description

Methods that act on the origin field in the NIfTI/ANALYZE header.

Usage

origin(object)

## S4 method for signature 'nifti'
origin(object)

## S4 method for signature 'anlz'
origin(object)

## S4 method for signature 'ANY'
origin(object)

origin(object) <- value

## S4 replacement method for signature 'anlz'
origin(object) <- value

## S4 replacement method for signature 'nifti'
origin(object) <- value

Arguments

object

is an object of class nifti or anlz.

value

is the value to assign to the origin field.

Details

See documentation on the ANALYZE and/or NIfTI data standards for more details.

Author(s)

John Muschelli [e-mail],
Brandon Whitcher [e-mail]

References

ANALYZE 7.5
http://eeg.sourceforge.net/ANALYZE75.pdf
NIfTI-1
http://nifti.nimh.nih.gov/

Examples

fname = system.file("nifti", "mniRL.nii.gz", 
package = "oro.nifti")
img = readNIfTI(fname)
oimg = origin(img)
stopifnot(all(oimg == c(-90, -126, -72)))
zero_img = img
origin(zero_img) = rep(0, 3)
stopifnot(all(origin(zero_img) == 0))