spm_fs_fmri_csd.m
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			function [y] = spm_fs_fmri_csd(y,M)
			% spectral feature selection for a CSD DCM
			% FORMAT [y] = spm_fs_fmri_csd(y,M)
			% y - CSD
			% M - model structure
			%__________________________________________________________________________
			%
			% This simply log-transforms the (real) auto-spectra
			%
			% David O, Friston KJ (2003) A neural mass model for MEG/EEG: coupling and
			% neuronal dynamics. NeuroImage 20: 1743-1755
			%__________________________________________________________________________
			% Copyright (C) 2008 Wellcome Trust Centre for Neuroimaging

			% Karl Friston
			% $Id: spm_fs_fmri_csd.m 5892 2014-02-23 11:00:16Z karl $


			% return (scaled) cross-spectra and covariance functions
			%--------------------------------------------------------------------------
			c = spm_csd2ccf(y,M.Hz);
			y = [y/16; c(1:8:end,:,:)*2];

Slepi/Code/Utilities/spm12/spm_fs_fmri_csd.m8a186cd82567master