Convert a Transformation

Source: R/convert_xfm.R

Convert a Transformation

invert_xfm(inmat, omat = tempfile(fileext = ".mat"), verbose = TRUE)

concat_xfm(inmat, inmat2, omat = tempfile(fileext = ".mat"), verbose = TRUE)

fixscaleskew_xfm(
  inmat,
  inmat2,
  omat = tempfile(fileext = ".mat"),
  verbose = TRUE
)

Arguments

inmat

input matrix transformation

omat

output matrix transformation

verbose

print diagnostic messages

inmat2

second matrix filename to be concatenated or fixscaleskew to first

Value

A filename of the output matrix file

Examples

if (have_fsl()) {
img = mni_fname()
mat = fslreorient2std_mat(img)
inverted = invert_xfm(mat)
readLines(inverted)
catted = concat_xfm(mat, mat)
readLines(catted)
fixed = fixscaleskew_xfm(mat, mat)
readLines(fixed)

}
#> fslreorient2std "/usr/local/fsl/data/standard/MNI152_T1_1mm.nii.gz"   > /var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T//RtmpKzob0N/file8575282f9865.mat ;
#> convert_xfm -omat /var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T//RtmpKzob0N/file85754cbe237f.mat -inverse "/private/var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T/RtmpKzob0N/file8575282f9865.mat"   ;
#> convert_xfm -omat /var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T//RtmpKzob0N/file8575570c8e35.mat -concat /var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T//RtmpKzob0N/file8575282f9865.mat "/private/var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T/RtmpKzob0N/file8575282f9865.mat"   ;
#> convert_xfm -omat /var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T//RtmpKzob0N/file8575794c6638.mat -fixscaleskew /var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T//RtmpKzob0N/file8575282f9865.mat "/private/var/folders/1s/wrtqcpxn685_zk570bnx9_rr0000gr/T/RtmpKzob0N/file8575282f9865.mat"   ;
#> [1] "1  0  0  0  " "0  1  0  0  " "0  0  1  0  " "0  0  0  1  "