cifti.axis.parcels

A parcel axis describes the parcels of a parcellated matrix dimension (the
mapping of <code>.pscalar</code>, <code>.ptseries</code>, <code>.pconn</code> and the second dimension of <code>.pdconn</code>).
As for brain models, the index of a parcel is its position in the list.

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.axis.parcels function

<dl><dt>parcels</dt>
<dd>list of parcels, as created by <code>cifti.parcel</code>.</dd>
<dt>surfaces</dt>
<dd>named integer vector or <code>NULL</code>, the number of vertices of the complete
surfaces the parcels refer to, see <code>cifti.axis.brain.models</code>. Unlike
Connectome Workbench, which writes them, this is optional here as well.</dd>
<dt>volume</dt>
<dd>a volume, see <code>cifti.volume</code>, for parcels that consist of
volume voxels, or <code>NULL</code>.</dd></dl>

Arguments

Create a CIFTI-2 axis for parcels. — cifti.axis.parcels

<dl>

<dt>parcels</dt>
<dd>list of parcels, as created by <code>cifti.parcel</code>.</dd>


<dt>surfaces</dt>
<dd>named integer vector or <code>NULL</code>, the number of vertices of the complete
surfaces the parcels refer to, see <code>cifti.axis.brain.models</code>. Unlike
Connectome Workbench, which writes them, this is optional here as well.</dd>


<dt>volume</dt>
<dd>a volume, see <code>cifti.volume</code>, for parcels that consist of
volume voxels, or <code>NULL</code>.</dd>

</dl>

cifti.axis.parcels: Create a CIFTI-2 axis for parcels.

Description

Usage

Value

Arguments

See Also

Examples