This shows you the differences between two versions of the page.

Link to this comparison view

reference:ft_sourceparcellate [2018/08/23 14:43] (current)
Line 1: Line 1:
 +Note that this reference documentation is identical to the help that is displayed in MATLAB when you type "help ft_sourceparcellate"​.
 +  <a href=/​reference/​ft_sourceparcellate><​font color=green>​FT_SOURCEPARCELLATE</​font></​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><​font color=green>​FT_SOURCEANALYSIS</​font></​a>​ or <a href=/​reference/​ft_compute_leadfield><​font color=green>​FT_COMPUTE_LEADFIELD</​font></​a>​. The input parcellation is
 +  described in detail in <a href=/​reference/​ft_datatype_parcellation><​font color=green>​FT_DATATYPE_PARCELLATION</​font></​a>​ (2-D) or <a href=/​reference/​ft_datatype_segmentation><​font color=green>​FT_DATATYPE_SEGMENTATION</​font></​a>​ (3-D) and
 +  can be obtained from <a href=/​reference/​ft_read_atlas><​font color=green>​FT_READ_ATLAS</​font></​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><​font color=green>​FT_SOURCEANALYSIS</​font></​a>,​ <a href=/​reference/​ft_datatype_parcellation><​font color=green>​FT_DATATYPE_PARCELLATION</​font></​a>,​ <a href=/​reference/​ft_datatype_segmentation><​font color=green>​FT_DATATYPE_SEGMENTATION</​font></​a>​