Description Usage Arguments Details Value Author(s) References See Also Examples
These functions read in the header information and multidimensional
array from a binary file in NIfTI-1 format into a
nifti
-class object.
1 |
fname |
is the file name of the NIfTI file(s). |
verbose |
is a logical variable (default = |
warn |
is a number to regulate the display of warnings (default =
-1). See |
reorient |
is a logical variable (default = |
call |
keeps track of the current function call for use in the NIfTI extension. |
The readNIfTI
function utilizes internal methods readBin
and readChar
to efficiently extract information from the binary
file(s).
Current acceptable data types include
BINARY (1 bit per voxel)
SIGNED SHORT (16 bits per voxel)
SINGED INT (32 bits per voxel)
FLOAT (32 bits per voxel)
DOUBLE (64 bits per voxel)
UNSIGNED SHORT (16 bits per voxel)
UNSIGNED INT (32 bits per voxel)
An object of class nifti
.
Brandon Whitcher bwhitcher@gmail.com,
Volker Schmid volkerschmid@users.sourceforge.net,
Andrew Thornton zeripath@users.sourceforge.net
NIfTI-1
http://nifti.nimh.nih.gov/
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | ## Not run:
url <- "http://nifti.nimh.nih.gov/nifti-1/data/filtered_func_data.nii.gz"
urlfile <- file.path(system.file("nifti", package="oro.nifti"),
"filtered_func_data")
download.file(url, urlfile, quiet=TRUE)
## End(Not run)
## The NIfTI file provided here contains the first 18 volumes (10%)
## of the original data set
urlfile <- file.path(system.file("nifti", package="oro.nifti"),
"filtered_func_data")
(ffd <- readNIfTI(urlfile))
image(ffd, oma=rep(2,4))
orthographic(ffd, oma=rep(2,4))
## Not run:
## 27 scans of Colin Holmes (MNI) brain co-registered and averaged
## NIfTI two-file format
URL <- "http://imaging.mrc-cbu.cam.ac.uk/downloads/Colin/colin_1mm.tgz"
urlfile <- file.path(tempdir(), "colin_1mm.tgz")
download.file(URL, dest=urlfile, quiet=TRUE)
untar(urlfile, exdir=tempdir())
colin <- readNIfTI(file.path(tempdir(), "colin_1mm"))
image(colin, oma=rep(2,4))
orthographic(colin, oma=rep(2,4))
## End(Not run)
|
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