roi_getpower.m

% roi_getpower() - compute power of a given ROI (region of interest)
%
% Usage:
%    [power, powernorm] = roi_getpower(roi_data, ind_roi);
%
% Inputs:
%    roi_data - [times x voxels x trials] source activity data
%    ind_roi  - indices of voxels for the ROI

% Copyright (C) Arnaud Delorme, arnodelorme@gmail.com
%
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% modification, are permitted provided that the following conditions are met:
%
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function [source_roi_power, source_roi_power_norm] = roi_getpower(source_voxel_data, ind_roi)

data_  = source_voxel_data(:, ind_roi, :);
source_roi_power = sum(var(data_(:, :)))';
source_roi_power_norm = source_roi_power/length(ind_roi);