function [S] = bigreadnplot(filename, interval)

%BIGREADNPLOT Read big sensor datafile, plot and put it in a matrix.
%         [S] = bigreadnplot(filename,interval) reads the data into matrix S.
%         and plots it every interval samples.
%
% 							Kristof Van Laerhoven, kristof@comp.lancs.ac.uk

    path = [];

	if ~exist('filename'),
		[filename path]= uigetfile('*.txt','Pick a file:')
	end;

    i = 1;
    S = [];
    T = [1];
    
    while (~isempty(T)),
        T = readsens(filename,i,i+interval);
        S = [S; T];
        i = i + interval;
        if ~isempty(T), 
            plot(T);
        end
        drawnow;
    end
    
end