Mercurial > hg > ltpda

annotate m-toolbox/classes/@ao/cov.m @ 2:18e956c96a1b database-connection-manager

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Add LTPDADatabaseConnectionManager implementation. Matlab code
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Sun, 04 Dec 2011 21:23:09 +0100
parents f0afece42f48
children
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % COV estimate covariance of data streams.
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: COV estimate covariance of data streams.
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5 %
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6 % CALL: c = cov(a,b, pl)
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7 %
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8 % INPUTS: pl - a parameter list
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9 % a,b - input analysis object
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10 %
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11 % OUTPUTS: c - output analysis object containing the covariance matrix.
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12 %
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13 % <a href="matlab:utils.helper.displayMethodInfo('ao', 'cov')">Parameters Description</a>
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14 %
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15 % VERSION: $Id: cov.m,v 1.18 2011/04/08 08:56:12 hewitson Exp $
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16 %
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17 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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18
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19 function varargout = cov(varargin)
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20
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21 % Check if this is a call for parameters
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22 if utils.helper.isinfocall(varargin{:})
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23 varargout{1} = getInfo(varargin{3});
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24 return
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25 end
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26
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27 import utils.const.*
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28 utils.helper.msg(msg.PROC3, 'running %s/%s', mfilename('class'), mfilename);
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29
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30 % Collect input variable names
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31 in_names = cell(size(varargin));
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32 for ii = 1:nargin,in_names{ii} = inputname(ii);end
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33
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34 % Collect all AOs and plists
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35 [as, ao_invars] = utils.helper.collect_objects(varargin(:), 'ao', in_names);
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36
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37 if nargout == 0
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38 error('### cov cannot be used as a modifier. Please give an output variable.');
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39 end
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40
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41 if numel(as) < 2
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42 error('### cov requires at least two input AOs to work.');
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43 end
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44
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45 % Convolute the data
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46 smat = [];
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47 inunits = unit;
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48 name = '';
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49 desc = '';
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50 for jj=1:numel(as)
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51 smat = [smat as(jj).data.getY];
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52 inunits = inunits .* as(jj).data.yunits;
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53 name = strcat(name, [',' ao_invars{jj}]);
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54 desc = strcat(desc, [' ' as(jj).description]);
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55 end
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56 desc = strtrim(desc);
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57 plotinfo = [as(:).plotinfo];
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58 if ~isempty(plotinfo)
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59 plotinfo = combine(plotinfo);
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60 end
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61
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62 bs = ao(cdata(cov(smat)));
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63 bs.name = sprintf('cov(%s)', name(2:end));
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64 bs.description = desc;
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65 bs.plotinfo = plotinfo;
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66 bs.data.setYunits(inunits);
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67 bs.addHistory(getInfo('None'), getDefaultPlist, ao_invars, [as(:).hist]);
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68
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69 % Set output
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70 if nargout == numel(bs)
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71 % List of outputs
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72 for ii = 1:numel(bs)
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73 varargout{ii} = bs(ii);
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74 end
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75 else
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76 % Single output
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77 varargout{1} = bs;
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78 end
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79 end
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80
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81 %--------------------------------------------------------------------------
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82 % Get Info Object
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83 %--------------------------------------------------------------------------
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84 function ii = getInfo(varargin)
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85 if nargin == 1 && strcmpi(varargin{1}, 'None')
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86 sets = {};
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87 pls = [];
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88 else
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89 sets = {'Default'};
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90 pls = getDefaultPlist;
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91 end
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92 % Build info object
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93 ii = minfo(mfilename, 'ao', 'ltpda', utils.const.categories.sigproc, '$Id: cov.m,v 1.18 2011/04/08 08:56:12 hewitson Exp $', sets, pls);
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94 ii.setModifier(false);
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95 ii.setArgsmin(2);
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96 end
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97
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98 %--------------------------------------------------------------------------
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99 % Get Default Plist
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100 %--------------------------------------------------------------------------
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101
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102
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103 function plout = getDefaultPlist()
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104 persistent pl;
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105 if exist('pl', 'var')==0 || isempty(pl)
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106 pl = buildplist();
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107 end
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108 plout = pl;
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109 end
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110
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111 function pl_default = buildplist()
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112 pl_default = plist.EMPTY_PLIST;
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113 end
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114