fs.tracts.lengths

Returns one integer per tract, the number of points it consists
of. The coordinates of tract <code>i</code> are the rows
<code>(cumsum(c(1, lengths))[i]):(cumsum(lengths)[i])</code> of
<code>fs.tracts.coords()</code>.

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) 

fs.tracts.lengths function

<dl><dt>tracts</dt>
<dd>an <code>fs.tracts</code> instance, as returned in the <code>tracks</code>
entry of <code>read.dti.tck</code> or <code>read.dti.trk</code>.</dd></dl>

Arguments

Get the number of points of each tract. — fs.tracts.lengths

<dl>

<dt>tracts</dt>
<dd>an <code>fs.tracts</code> instance, as returned in the <code>tracks</code>
entry of <code>read.dti.tck</code> or <code>read.dti.trk</code>.</dd>

</dl>

fs.tracts.lengths: Get the number of points of each tract.

Description

Usage

Value

Arguments

Examples