nii2R: NIfTI-to-R conversion
In vows: Voxelwise Semiparametrics

Reads in a NIfTI (.nii) file and puts the data in a 4-dimensional array.

1 2	nii2R(niifilename, which.vols = NULL, savename = NULL, remove.zero = TRUE, maskname = NULL, ind = NULL, ind.auto = TRUE, coord = NULL)

`niifilename`	the path for the .nii file.
`which.vols`	which volumes (images) to include. In terms of the 4D array, this refers to subsetting in the fourth dimension. If `NULL` (the default), all volumes are included.
`savename`	if non-`NULL`, the name of the .RData file to which the 4D array will be saved.
`remove.zero`	optional when maskname is not provided. If `TRUE`, a binary array indicating the voxels with nonzero measures based on the first three dimension of the nii file will be provided. If `FALSE`, a 3D array with `TRUE` everywhere will be provided.
`maskname`	name of a .nii file providing a "mask", a 3D binary array indicating which voxels to include.
`ind, ind.auto`	`ind` is an optional list saying which indices (which slices of the image) to include in each of the three dimensions. If `NULL`, this will be all slices with nonzero data if `ind.auto = TRUE`, and all slices otherwise.
`coord`	coordinates of the first three dimensions of the 4D array created.