view m-toolbox/classes/@cdata/times.m @ 34:03d92954b939
database-connection-manager
Improve look of LTPDAPreferences diaolog
author |
Daniele Nicolodi <nicolodi@science.unitn.it> |
date |
Mon, 05 Dec 2011 16:20:06 +0100 (2011-12-05) |
parents |
f0afece42f48 |
children |
|
line source
% TIMES implements element multiplication for cdata objects.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DESCRIPTION: TIMES implements element multiplication for two cdata objects.
%
% CALL:
% a = d1.*d2
% a = times(d1,d2);
%
%
% <a href="matlab:utils.helper.displayMethodInfo('cdata', 'times')">Parameters Description</a>
%
% VERSION: $Id: times.m,v 1.2 2011/04/08 08:56:34 hewitson Exp $
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function varargout = times(varargin)
% get two data objects
d1 = copy(varargin{1}, nargout);
d2 = copy(varargin{2}, nargout);
% check units
d1.yunits.simplify();
d2.yunits.simplify();
% add the data
dout = applyoperator(d1,d2,'times');
% handle units: multiply the units
dout.yunits = d1.yunits.*d2.yunits;
% handle errors
err = @(err1, err2, val1, val2) sqrt( (err1./val1).^2 + (err2./val2).^2 ) .* abs(val1.*val2);
if ~isempty(d1.dy) || ~isempty(d2.dy)
if isempty(d1.dy)
d1.dy = zeros(size(d2.dy));
end
if isempty(d2.dy)
d2.dy = zeros(size(d1.dy));
end
dout.dy = err(d1.dy, d2.dy, d1.y, d2.y);
else
dout.dy = [];
end
% Single output
varargout{1} = dout;
end