Load transformation matrix from an XFM file.

Load transformation matrix from an XFM file.

Usage

read.fs.transform.xfm(filepath)

Arguments

filepath

character string, the full path to the transform file.

Value

4x4 numerical matrix, the transformation matrix

Note

Currently this function has been tested with linear transformation files only, all others are unsupported.

See also

Other header coordinate space: mghheader.is.ras.valid(), mghheader.ras2vox(), mghheader.ras2vox.tkreg(), mghheader.scanner2tkreg(), mghheader.tkreg2scanner(), mghheader.vox2ras(), mghheader.vox2ras.tkreg(), read.fs.transform(), read.fs.transform.dat(), read.fs.transform.lta(), sm0to1(), sm1to0()

Examples

tf_file <- system.file("extdata", "talairach.xfm",
  package = "freesurferformats",
  mustWork = TRUE
)
transform <- read.fs.transform.xfm(tf_file)
transform$matrix
#>           [,1]      [,2]     [,3]       [,4]
#> [1,]  1.111536  0.040948 0.012535  -0.803558
#> [2,] -0.029730  0.981154 0.342306 -19.558083
#> [3,]  0.022961 -0.452588 1.111222  10.044540
#> [4,]  0.000000  0.000000 0.000000   1.000000