function o=subseqdata(X,ranges,varargin)
% SUBSEQDATA - Sequence of subranges of a large array
%
% subseqdata ::
%    [[N,M]] ~ 'big array',
%    [[2,K]] ~ 'start and end indices'
% -> data [[N,M]].    ~ 'resultant sequence'.
	o=fnseq(@(r)extract(X,2,r),window(ranges),'sizecheck',1);
end
	
		


