read.NIFTI: I/O Functions
Description
Read fMRI data from NIFTI file(s).
Usage
read.NIFTI(filename, level = 0.75, mask=NULL, setmask=TRUE)
Value
Object of class "fmridata" with the following list entries:
- ttt
raw vector (numeric size 4) containing the four dimensional data cube (the first three dimensions are voxel
dimensions, the fourth dimension denotes the time).
- header
header information of the data
- format
data source. string "NIFTI"
- delta
voxel size in mm
- origin
position of the datacube origin
- orient
data orientation code
- dim
dimension of the datacube
- weights
weights vector coding the relative voxel sizes in x,
y, z-direction
- mask
head mask
Arguments
- filename
name of the NIfTI file
- level
Quantile level defining the mask
- mask
array or nifti-object containing the mask. If set this replaces
the mask defined by argument level.
- setmask
Logical (default TRUE), whether to define a suitable mask based on level
Details
This function reads fMRI data files in NIfTI format.
The filename can be given with or without extension. If extension is
not included, the function searches for the ".nii" file and then for
the "hdr/img" pair.
References
Polzehl, J. and Tabelow, K. (2007)
fmri: A Package for Analyzing fmri Data,
R News, 7:13-17 .
Examples
Run this code if (FALSE) analyze <- read.NIFTI("niftifile.nii")
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