next.buffer.capacity

Validates that the data actually needed fits into the configured
allocation limit, then returns the new buffer capacity to allocate. The
capacity grows geometrically to keep the number of reallocations
logarithmic, but it is capped at the limit: an overshoot of the growth must
not make a read fail that would have fit into memory, and it must not
exceed the limit either.

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) 

next.buffer.capacity function

<dl><dt>needed</dt>
<dd>numeric, the number of rows that the buffer must hold.</dd>
<dt>capacity</dt>
<dd>numeric, the current capacity.</dd>
<dt>bytes_per_elem</dt>
<dd>numeric, bytes per row (for integer vectors this is the
size of a single element).</dd>
<dt>label</dt>
<dd>character string or NULL, description used in error messages.</dd></dl>

Arguments

Compute the next capacity for a growing result buffer. — next.buffer.capacity

<dl>

<dt>needed</dt>
<dd>numeric, the number of rows that the buffer must hold.</dd>


<dt>capacity</dt>
<dd>numeric, the current capacity.</dd>


<dt>bytes_per_elem</dt>
<dd>numeric, bytes per row (for integer vectors this is the
size of a single element).</dd>


<dt>label</dt>
<dd>character string or NULL, description used in error messages.</dd>

</dl>

next.buffer.capacity: Compute the next capacity for a growing result buffer.

Description

Usage

Value

Arguments