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mtc_concat.m
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function [varargout] = mtc_concat(targetfile, mtcs, varargin)
% mtc_concat - concatenate MTCs
%
% FORMAT: newmtc = mtc_concat(targetfile, mtclist [, options]);
% or newmtc = mtc_concat(targetfile, mtc1, mtc2, ... [, options]);
%
% Input fields:
%
% targetfile filename of MTC to write
% mtclist cell array with MTCs to concatenated
% mtc1, ... single MTCs to concatenated
% options 1x1 struct with optional settings
% .trans transformation to apply on each MTC on reading
% either of 'psc' or 'z'
%
% Output fields:
%
% newmtc object handle to newly written MTC
% Version: v0.9b
% Build: 11050712
% Date: Apr-09 2011, 11:08 PM EST
% Author: Jochen Weber, SCAN Unit, Columbia University, NYC, NY, USA
% URL/Info: http://neuroelf.net/
% Copyright (c) 2010, 2011, Jochen Weber
% All rights reserved.
%
% Redistribution and use in source and binary forms, with or without
% modification, are permitted provided that the following conditions are met:
% * Redistributions of source code must retain the above copyright
% notice, this list of conditions and the following disclaimer.
% * Redistributions in binary form must reproduce the above copyright
% notice, this list of conditions and the following disclaimer in the
% documentation and/or other materials provided with the distribution.
% * Neither the name of Columbia University nor the
% names of its contributors may be used to endorse or promote products
% derived from this software without specific prior written permission.
%
% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
% ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
% WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
% DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
% DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
% (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
% LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
% ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
% (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
% SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
% argument check
if nargin < 2 || ...
~ischar(targetfile) || ...
isempty(targetfile) || ...
(~all(isxff(mtcs, 'mtc')) && ...
~iscell(mtcs)) || ...
isempty(mtcs)
error( ...
'neuroelf:BadArgument', ...
'You must give a valid target filename and some MTCs.' ...
);
end
if all(isxff(mtcs, 'mtc'))
mtcc = cell(1, numel(mtcs));
for mc = 1:numel(mtcs)
mtcc{mc} = mtcs(mc);
end
mtcs = mtcc;
end
for n = 3:nargin
if isxff(varargin{n - 2}, 'mtc')
mtcs{end + 1} = varargin{n - 2};
end
end
nm = numel(mtcs);
if nm == 1
error( ...
'neuroelf:TooFewArguments', ...
'You need at least two MTCs to concatenate.' ...
);
end
% options ?
transopt = 0;
if nargin > 2 && ...
isstruct(varargin{end}) && ...
numel(varargin{end}) == 1
options = varargin{end};
else
options = struct;
end
if isfield(options, 'trans') && ...
ischar(options.trans) && ...
~isempty(options.trans)
switch (lower(options.trans(:)'))
case {'psc', '%'}
transopt = 1;
case {'z'}
transopt = 2;
end
end
% check mtcs argument for filenames
loadmtcs = false(1, nm);
for mc = 1:nm
if ischar(mtcs{mc}) && ...
exist(mtcs{mc}(:)', 'file') == 2
loadmtcs(mc) = true;
elseif numel(mtcs{mc}) ~= 1 || ...
~isxff(mtcs{mc}, 'mtc')
error( ...
'neuroelf:BadArgument', ...
'Cell array must contain either MTC objects or filenames.' ...
);
end
end
if any(loadmtcs)
mtctiosz = xff(0, 'transiosize', 'mtc');
xff(0, 'transiosize', 'mtc', 65536);
rlsame = xff(0, 'config', 'reloadsame');
xff(0, 'config', 'reloadsame', true);
for mc = find(loadmtcs)
if ischar(mtcs{mc})
try
mtcfname = mtcs{mc}(:)';
mtcs{mc} = xff(mtcfname);
catch ne_eo;
clearxffobjects(mtcs(loadmtcs));
xff(0, 'config', 'reloadsame', rlsame);
xff(0, 'transiosize', 'mtc', mtctiosz);
error( ...
'neuroelf:xffError', ...
'Error opening MTC ''%s'' (%s).', ...
mtcfname, ne_eo.message ...
);
end
end
end
xff(0, 'config', 'reloadsame', rlsame);
xff(0, 'transiosize', 'mtc', mtctiosz);
end
% check headers
mh = mtcs{1};
vs = size(mh.MTCData);
mtp = zeros(1, nm);
ntp = vs(1);
mtp(1) = ntp;
for mc = 2:nm
cs = size(mtcs{mc}.MTCData);
if cs(2) ~= vs(2)
clearxffobjects(mtcs(loadmtcs));
error( ...
'neuroelf:BadArgument', ...
'MTCs must match in NrOfVertices property.' ...
);
end
ntp = ntp + cs(1);
mtp(mc) = cs(1);
end
mtp = 1 + [0, cumsum(mtp)];
% construct transioobject
tobjname = tempname;
tobj = transio(tobjname, 'ieee-le', 'single', 0, [ntp, cs(2)], 1);
% copy first MTC object, and set new NrOfTimePoints, MTCData
newmtc = bless(mtcs{1}.CopyObject, 1);
newmtc.NrOfTimePoints = ntp;
newmtc.SourceVTCFile = '<concatenated>';
newmtc.LinkedPRTFile = '<none>';
newmtc.MTCData = tobj;
% create temporary object in mem
mo = single(0);
mo(ntp, 1000) = 0;
% always take 1000 vertices at a time
sc = 1;
st = 999;
while (sc + st) <= cs(2)
for mc = 1:nm
if transopt == 2
mo(mtp(mc):(mtp(mc + 1)-1), :) = ...
ztrans(double(mtcs{mc}.MTCData(:, sc:(sc + st))));
elseif transopt == 1
mo(mtp(mc):(mtp(mc + 1)-1), :) = ...
psctrans(double(mtcs{mc}.MTCData(:, sc:(sc + st))));
else
mo(mtp(mc):(mtp(mc + 1)-1), :) = ...
mtcs{mc}.MTCData(:, sc:(sc + st));
end
end
newmtc.MTCData(:, sc:(sc + st)) = mo;
sc = sc + st + 1;
end
% for the last part, remove part of mo
mo(:, (cs(2) + 2 - sc):end) = [];
if ~isempty(mo)
for mc = 1:nm
if transopt == 2
mo(mtp(mc):(mtp(mc + 1)-1), :) = ...
ztrans(double(mtcs{mc}.MTCData(:, sc:cs(2))));
elseif transopt == 1
mo(mtp(mc):(mtp(mc + 1)-1), :) = ...
psctrans(double(mtcs{mc}.MTCData(:, sc:cs(2))));
else
mo(mtp(mc):(mtp(mc + 1)-1), :) = ...
mtcs{mc}.MTCData(:, sc:cs(2));
end
end
newmtc.MTCData(:, sc:cs(2)) = mo;
end
% clear objects
clearxffobjects(mtcs(loadmtcs));
% save MTC under new name
try
newmtc.SaveAs(targetfile);
catch ne_eo;
neuroelf_lasterr(ne_eo);
warning( ...
'neuroelf:BadArgument', ...
'Bad target filename given. Please remove ''%s'' manually.', ...
tobjname ...
);
newmtc.ClearObject;
return;
end
% delete old temp object
delete(tobjname);
% if no argout, clear object
if nargout < 1
newmtc.ClearObject;
else
varargout = cell(1, nargout);
varargout{1} = newmtc;
end