fiff_reset_ch_pos.m
2cb18aae5832master

fiff_reset_ch_pos.m
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			function [res] = fiff_reset_ch_pos(chs)
			%
			% [res] = fiff_reset_ch_pos(chs)
			%
			% Reset channel position data to their original values as listed in
			% the fif file
			%
			% NOTE: Only the coil_trans field is modified by this routine, not
			% loc which remains to reflect the original data read from the fif file
			%
			%

			%
			% Author : Matti Hamalainen, MGH Martinos Center
			% License : BSD 3-clause
			%
			%
			% Revision 1.4 2006/05/03 18:53:05 msh
			% Approaching Matlab 6.5 backward compatibility
			%
			% Revision 1.3 2006/04/23 15:29:40 msh
			% Added MGH to the copyright
			%
			% Revision 1.2 2006/04/18 20:44:46 msh
			% Added reading of forward solution.
			% Use length instead of size when appropriate
			%
			% Revision 1.1 2006/04/13 22:37:03 msh
			% Added head_head_trans field to info.
			%
			%

			me='MNE:fiff_reset_channel_pos';

			global FIFF;
			if isempty(FIFF)
			FIFF = fiff_define_constants();
			end

			if nargin ~= 1
			error(me,'Wrong number of arguments');
			end

			res = chs;
			for k = 1:length(res)
			loc = res(k).loc;
			if res(k).kind == FIFF.FIFFV_MEG_CH \|\| ...
			res(k).kind == FIFF.FIFFV_REF_MEG_CH
			res(k).coil_trans = [ [ loc(4:6) loc(7:9) ...
			loc(10:12) ...
			loc(1:3) ] ; [ 0 0 0 1 ] ];
			res(k).coord_frame = FIFF.FIFFV_COORD_DEVICE;
			elseif res(k).kind == FIFF.FIFFV_EEG_CH
			res(k).eeg_loc = [ loc(1:3) loc(4:6) ];
			res(k).coord_frame = FIFF.FIFFV_COORD_HEAD;
			end
			end

			return;

			end