Load a label from file and apply it to morphometry data.

This function will set all values in morphdata which are not part of the label loaded from the file to NA (or whatever is specified by 'masked_data_value'). This is typically used to ignore values which are not part of the cortex (or any other label) during your analysis.

Usage

apply.label.to.morphdata(
  morphdata,
  subjects_dir,
  subject_id,
  hemi,
  label,
  masked_data_value = NA
)

Arguments

morphdata

numerical vector, the morphometry data for one hemisphere

subjects_dir

string. The FreeSurfer SUBJECTS_DIR, i.e., a directory containing the data for all your subjects, each in a subdir named after the subject identifier.

subject_id

string. The subject identifier

hemi

string, one of 'lh', 'rh' or 'both'. The hemisphere name. Used to construct the names of the annotation and morphometry data files to be loaded.

label

string, fs.label instance, or label vertex data. If a string, interpreted as the file name of the label file, without the hemi part (if any), optionally including the '.label' suffix. E.g., 'cortex.label' or 'cortex' for '?h.cortex.label'.

masked_data_value

numerical, the value to set for all morphometry data values of vertices which are not part of the label. Defaults to NA.

Value

numerical vector, the masked data.

See also

Other label functions: apply.labeldata.to.morphdata(), subject.lobes(), subject.mask(), vis.labeldata.on.subject(), vis.subject.label()

Other morphometry data functions: apply.labeldata.to.morphdata(), group.morph.native(), group.morph.standard(), subject.morph.native(), subject.morph.standard()