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annotate m-toolbox/classes/+utils/@math/isequal.m @ 43:bc767aaa99a8

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CVS Update
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Tue, 06 Dec 2011 11:09:25 +0100
parents f0afece42f48
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % ISEQUAL test if two matrices are equal to within the given tolerance.
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2 %
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3 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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4 %
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5 % DESCRIPTION: ISEQUAL test if two matrices are equal to within the given
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6 % tolerance.
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7 %
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8 % CALL: result = isequal(m1, m2)
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9 % result = isequal(m1, m2, tol)
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10 %
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11 % INPUTS: m1 - a matrix of real or complex values
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12 % m2 - a matrix of real or complex values
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13 % tol - the tolerance to test against [default: 1e-14]
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14 %
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15 % OUTPUTS: result - true or false
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16 %
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17 % VERSION: $Id: isequal.m,v 1.8 2010/11/19 12:40:13 ingo Exp $
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18 %
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19 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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20 function res = isequal(varargin)
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21
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22 % Check size of the input numbers
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23 if ~all(size(varargin{1}) == size(varargin{2})) || ...
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24 ~(isnumeric(varargin{1}) || islogical(varargin{1})) || ...
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25 ~(isnumeric(varargin{2}) || islogical(varargin{2}))
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26 res = false;
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27 return
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28 end
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29
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30 m1 = double(varargin{1});
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31 m2 = double(varargin{2});
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32
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33 r = m1./m2;
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34
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35 if nargin > 2 && ~isempty(varargin{3})
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36 tol = varargin{3};
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37 else
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38 tol = 1e-14;
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39 end
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40
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41 maxAbsDiff = abs(max(1-abs(r)));
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42 minAbsDiff = abs(min(1-abs(r)));
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43 maxAngleDiff = max(abs(angle(r)));
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44 minAngleDiff = min(abs(angle(r)));
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45
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46 maxAbsDiff(isnan(maxAbsDiff))=0;
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47 minAbsDiff(isnan(minAbsDiff))=0;
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48 maxAngleDiff(isnan(maxAngleDiff))=0;
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49 minAngleDiff(isnan(minAngleDiff))=0;
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50
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51 if all([maxAbsDiff < tol,...
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52 minAbsDiff < tol, ...
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53 maxAngleDiff < tol, ...
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54 minAngleDiff < tol])
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55
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56 res = true;
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57 else
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58 res = false;
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59 end
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60
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61 end