R/fs_setup.R
fs_subj_dir.Rd
Finds the SUBJECTS_DIR from system environment or getOption("fs.subj_dir") for subjects dir
getOption("fs.subj_dir")
fs_subj_dir()
SUBJECTS_DIR, such as ${FREESURFER_HOME}/subjects
${FREESURFER_HOME}/subjects
if (have_fs()) { fs_subj_dir() }