reference:ft_sourceparcellate [FieldTrip]

===== FT_SOURCEPARCELLATE ===== Note that this reference documentation is identical to the help that is displayed in MATLAB when you type "help ft_sourceparcellate". <html><pre> <a href=/reference/ft_sourceparcellate>FT_SOURCEPARCELLATE</a> combines the source-reconstruction parameters over the parcels, for example by averaging all the values in the anatomically or functionally labeled parcel. Use as output = ft_sourceparcellate(cfg, source, parcellation) where the input source is a 2D surface-based or 3-D voxel-based source grid that was for example obtained from <a href=/reference/ft_sourceanalysis>FT_SOURCEANALYSIS</a> or <a href=/reference/ft_compute_leadfield>FT_COMPUTE_LEADFIELD</a>. The input parcellation is described in detail in <a href=/reference/ft_datatype_parcellation>FT_DATATYPE_PARCELLATION</a> (2-D) or <a href=/reference/ft_datatype_segmentation>FT_DATATYPE_SEGMENTATION</a> (3-D) and can be obtained from <a href=/reference/ft_read_atlas>FT_READ_ATLAS</a> or from a custom parcellation/segmentation for your individual subject. The output is a channel-based representation with the combined (e.g. averaged) representation of the source parameters per parcel. The configuration "cfg" is a structure that can contain the following fields cfg.method = string, method to combine the values, see below (default = 'mean') cfg.parcellation = string, fieldname that contains the desired parcellation cfg.parameter = cell-array with strings, fields that should be parcellated (default = 'all') The values within a parcel or parcel-combination can be combined with different methods: 'mean' compute the mean 'median' compute the median (unsupported for fields that are represented in a cell-array) 'eig' compute the largest eigenvector 'min' take the minimal value 'max' take the maximal value 'maxabs' take the signed maxabs value See also <a href=/reference/ft_sourceanalysis>FT_SOURCEANALYSIS</a>, <a href=/reference/ft_datatype_parcellation>FT_DATATYPE_PARCELLATION</a>, <a href=/reference/ft_datatype_segmentation>FT_DATATYPE_SEGMENTATION</a> </pre></html>