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annotate m-toolbox/classes/@cdata/times.m @ 0:f0afece42f48

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Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % TIMES implements element multiplication for cdata objects.
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: TIMES implements element multiplication for two cdata objects.
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5 %
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6 % CALL:
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7 % a = d1.*d2
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8 % a = times(d1,d2);
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9 %
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10 %
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11 % <a href="matlab:utils.helper.displayMethodInfo('cdata', 'times')">Parameters Description</a>
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12 %
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13 % VERSION: $Id: times.m,v 1.2 2011/04/08 08:56:34 hewitson Exp $
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14 %
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15 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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16
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17 function varargout = times(varargin)
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18
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19 % get two data objects
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20 d1 = copy(varargin{1}, nargout);
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21 d2 = copy(varargin{2}, nargout);
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22
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23 % check units
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24 d1.yunits.simplify();
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25 d2.yunits.simplify();
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26
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27 % add the data
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28 dout = applyoperator(d1,d2,'times');
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29
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30 % handle units: multiply the units
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31 dout.yunits = d1.yunits.*d2.yunits;
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32
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33 % handle errors
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34 err = @(err1, err2, val1, val2) sqrt( (err1./val1).^2 + (err2./val2).^2 ) .* abs(val1.*val2);
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35 if ~isempty(d1.dy) || ~isempty(d2.dy)
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36 if isempty(d1.dy)
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37 d1.dy = zeros(size(d2.dy));
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38 end
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39 if isempty(d2.dy)
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40 d2.dy = zeros(size(d1.dy));
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41 end
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42 dout.dy = err(d1.dy, d2.dy, d1.y, d2.y);
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43 else
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44 dout.dy = [];
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45 end
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46
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47 % Single output
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48 varargout{1} = dout;
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49
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50 end
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