Output

Description Usage Arguments Details Value Methods Author(s) References See Also Examples

This function saves a afni-class object to HEAD/BRIK pair in AFNI format.

writeAFNI(nim, ...)

## S4 method for signature 'afni'
writeAFNI(nim, fname, verbose = FALSE, warn = -1)

`nim`	is an object of class `afni`.
`...`	Additional variables defined by the method.
`fname`	is the path and file name to save the AFNI file (.HEAD/BRIK) without the suffix.
`verbose`	is a logical variable (default = `FALSE`) that allows text-based feedback during execution of the function.
`warn`	is a number to regulate the display of warnings (default = -1). See `options` for more details.

The writeAFNI function utilizes the internal writeBin and writeLines command to write information to header/binary file pair.

Current acceptable data types include

INT16": DT SIGNED SHORT (16 bits per voxel)
FLOAT32": DT FLOAT (32 bits per voxel)
"COMPLEX128": DT COMPLEX (128 bits per voxel)

Nothing.

nim = "afni": Write AFNI volume to disk.
nim = "ANY": Not implemented.

Karsten Tabelow karsten.tabelow@wias-berlin.de

AFNI
http://afni.nimh.nih.gov/pub/dist/src/README.attributes

writeANALYZE, writeNIfTI

## Taken from the AFNI Matlab Library
## http://afni.nimh.nih.gov/pub/dist/data/afni_matlab_data.tgz
afni.path <- system.file("afni", package="oro.nifti")
orig <- readAFNI(file.path(afni.path, "ARzs_CW_avvr.DEL+orig"))
fname = file.path(tempdir(), "test-afni-image")
writeAFNI(orig, fname, verbose=TRUE)

data <- readAFNI(fname, verbose=TRUE)
image(orig, zlim=c(0.5,256), oma=rep(2,4), bg="white")
image(data, zlim=c(0.5,256), oma=rep(2,4), bg="white")
abs.err <- abs(data - orig)
image(as(abs.err, "nifti"), zlim=range(0,1), oma=rep(2,4),
      bg="white")