read.fs.patch: Read FreeSurfer binary or ASCII patch file.

In freesurferformats: Read and Write 'FreeSurfer' Neuroimaging File Formats

Description

A patch is a subset of a surface. Note that the contents of ASCII and binary patch format files is different. A binary format patch contains vertices only, without connection (face) information. ASCII patch files can also contain face data. See the return value description for details.

Usage

read.fs.patch(filepath, format = "auto")

Arguments

filepath	string. Full path to the input patch file. An example file is 'FREESURFER_HOME/subjects/fsaverage/surf/lh.cortex.patch.3d'.
format	one of 'auto', 'asc', or 'bin'. The format to assume. If set to 'auto' (the default), binary format will be used unless the filepath ends with '.asc'.

Value

named list with 2 entries: "faces": can be NULL, only available if the format is ASCII, see return value of read.fs.patch.asc. "vertices": numerical *n*x7 matrix. The columns are named, and appear in the following order: 'vert_index1': the one-based (R-style) vertex index. 'x', 'y', 'z': float vertex coordinates. 'is_border': integer, 1 if the vertex lies on the patch border, 0 otherwise (treat as logical). 'raw_vtx': integer, the raw vtx value encoding index and border. 'vert_index0': the zero-based (C-style) vertex index.

See Also

Other patch functions: fs.patch(), read.fs.patch.asc(), write.fs.patch()

freesurferformats documentation built on Feb. 11, 2022, 5:06 p.m.