check_file_size

Compares the expected data size against the file size on disk.
Stops with an error if the file is too small (truncated or corrupt).

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) 

check_file_size function

<dl><dt>filepath</dt>
<dd>character string, path to the file.</dd>
<dt>header_bytes</dt>
<dd>single numeric value, the number of bytes consumed by
the file header (everything before the data payload).</dd>
<dt>data_bytes</dt>
<dd>single numeric value, the expected number of bytes in the
data payload.</dd></dl>

Arguments

Check that a file is large enough to contain the expected data payload. — check_file_size

<dl>

<dt>filepath</dt>
<dd>character string, path to the file.</dd>


<dt>header_bytes</dt>
<dd>single numeric value, the number of bytes consumed by
the file header (everything before the data payload).</dd>


<dt>data_bytes</dt>
<dd>single numeric value, the expected number of bytes in the
data payload.</dd>

</dl>

check_file_size: Check that a file is large enough to contain the expected data payload.

Description

Usage

Value

Arguments