Extract Image Attribute quatern_b — quatern

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

quatern_b(object)

# S4 method for nifti
quatern_b(object)

quatern_b(object) <- value

# S4 method for nifti
quatern_b(object) <- value

quatern.b(object)

# S4 method for nifti
quatern.b(object)

quatern.b(object) <- value

# S4 method for nifti
quatern.b(object) <- value

# S4 method for niftiImage
quatern_b(object)

# S4 method for niftiImage
quatern_b(object) <- value

Arguments

object	is an object of class `nifti` or `anlz`.
value	is the value to assign to the `quatern_b` field.

Details

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

References

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

Author

John Muschelli muschellij2@gmail.com,
Brandon Whitcher bwhitcher@gmail.com

Examples

file = system.file("extdata", "example.nii.gz", package = "RNifti")
img = RNifti::readNifti(file)
quatern_b(img)
#> [1] 0
quatern_b(img) = 3
stopifnot(quatern_b(img) == 3)
quatern_c(img)
#> [1] 1
quatern_c(img) = 3
stopifnot(quatern_c(img) == 3)
quatern_d(img)
#> [1] 0
quatern_d(img) = 3
stopifnot(quatern_d(img) == 3)