cifti.file.looks.like.cifti2

Cheap and silent check whether a file is a CIFTI-2 file, i.e. a NIFTI v2
file with a header extension of code 32, the extension that holds the CIFTI XML
metadata. The format dispatchers (<code>read.fs.morph()</code>, <code>read.fs.volume()</code>) use it to
give a helpful error: the payload of a CIFTI-2 file is a matrix whose dimensions the
XML describes, not a volume or a per-vertex vector, so reading it with the NIFTI
reader silently returns values in an order that means nothing.

internal

Provides functions to read and write neuroimaging data in various file formats, with a focus on 'FreeSurfer' formats. This includes, but is not limited to, the following file formats: 1) MGH/MGZ/NIFTI format files, which can contain multi-dimensional images or other data. Typically they contain time-series of three-dimensional brain scans acquired by magnetic resonance imaging (MRI). They can also contain vertex-wise measures of surface morphometry data. The MGH format is named after the Massachusetts General Hospital, and the MGZ format is a compressed version of the same format. 2) 'FreeSurfer' morphometry data files in binary 'curv' format. These contain vertex-wise surface measures, i.e., one scalar value for each vertex of a brain surface mesh. These are typically values like the cortical thickness or brain surface area at each vertex. 3) Annotation file format. This contains a brain surface parcellation derived from a cortical atlas. 4) Surface file format. Contains a brain surface mesh, given by a list of vertices and a list of faces.

Tim Schc3<a4>fer

freesurferformats

Read and Write 'FreeSurfer' Neuroimaging File Formats

Tim Schäfer

Van Essen Lab 

Montreal Neurological Institute (MNI) 

cifti.file.looks.like.cifti2 function

<dl><dt>filepath</dt>
<dd>character string, the path to a CIFTI-2 file (usually one of
<code>.dscalar.nii</code>, <code>.dtseries.nii</code>, <code>.dlabel.nii</code>, <code>.dconn.nii</code>, <code>.pscalar.nii</code>,
<code>.ptseries.nii</code>, <code>.pconn.nii</code>, <code>.dpconn.nii</code> or <code>.pdconn.nii</code>). Note that
this is not a NIFTI file, despite the <code>.nii</code> part. Gzipped CIFTI files are
not supported, because the CIFTI-2 format forbids compression.</dd></dl>

Arguments

Check whether a file is a CIFTI-2 file (internal helper). — cifti.file.looks.like.cifti2

<dl>

<dt>filepath</dt>
<dd>character string, the path to a CIFTI-2 file (usually one of
<code>.dscalar.nii</code>, <code>.dtseries.nii</code>, <code>.dlabel.nii</code>, <code>.dconn.nii</code>, <code>.pscalar.nii</code>,
<code>.ptseries.nii</code>, <code>.pconn.nii</code>, <code>.dpconn.nii</code> or <code>.pdconn.nii</code>). Note that
this is not a NIFTI file, despite the <code>.nii</code> part. Gzipped CIFTI files are
not supported, because the CIFTI-2 format forbids compression.</dd>

</dl>

cifti.file.looks.like.cifti2: Check whether a file is a CIFTI-2 file (internal helper).

Description

Usage

Value

Arguments