spm_write_plane.m
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	function V = spm_write_plane(V,dat,n)
	% Write transverse plane(s) of image data
	% FORMAT V = spm_write_plane(V,dat,n)
	% V - data structure containing image information (see spm_vol)
	% dat - the two/three dimensional image to write
	% n - the plane number(s) (beginning from 1). If an entire volume
	% should be written, n should contain the single character ':'
	% instead of plane numbers.
	%
	% V - (possibly) modified data structure containing image information.
	% It is possible that future versions of spm_write_plane may
	% modify scalefactors (for example).
	%_______________________________________________________________________
	% Copyright (C) 1999-2014 Wellcome Trust Centre for Neuroimaging

	% John Ashburner
	% $Id: spm_write_plane.m 6079 2014-06-30 18:25:37Z spm $

	% For performance reasons, on network filesystems one should write
	% out as large contiguous blocks data as possible at once. Therefore,
	% multiple planes or even entire volumes should be handled here.
	% Dimension checking is left to mat2file.

	if isfield(V,'n')
	n1 = num2cell(V.n);
	n = {n n1{:}};
	else
	n = {n};
	end
	S = struct('type','()','subs',{{':',':',n{:}}});
	V.private.dat = subsasgn(V.private.dat,S,dat);