doapply.transform.mtx: Apply a spatial transformation matrix to the given...

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

Description

Apply a spatial transformation matrix to the given coordinates.

Usage

doapply.transform.mtx(coords, mtx, as_mat = FALSE)

Arguments

coords	nx3 (cartesian) or nx4 (homogeneous) numerical matrix, the input coordinates. If nx4, left as is for homogeneous notation, if nx3 (cartesian) a 1 will be appended as the 4th position.
mtx	a 4x4 numerical transformation matrix
as_mat	logical, whether to force the output coords into a matrix (even if the input was a vector/a single coordinate triple).

Value

the coords after applying the transformation. If coords was nx3, nx3 is returned, otherwise nx4.

Examples

    coords_tf = doapply.transform.mtx(c(1.0, 1.0, 1.0), mni152reg());
    coords_tf;
    doapply.transform.mtx(coords_tf, solve(mni152reg()));

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