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annotate m-toolbox/classes/@pzmodel/simplify.m @ 24:056f8e1e995e database-connection-manager

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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
parents f0afece42f48
children
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % SIMPLIFY simplifies pzmodels by cancelling like poles with like zeros.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: SIMPLIFY simplifies pzmodels by cancelling like poles with
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Daniele Nicolodi <nicolodi@science.unitn.it>
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5 % like zeros.
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6 %
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7 % CALL: pzm = simplify(pzm);
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8 %
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9 % <a href="matlab:utils.helper.displayMethodInfo('pzmodel', 'simplify')">Parameters Description</a>
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10 %
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11 % VERSION: $Id: simplify.m,v 1.12 2011/04/08 08:56:33 hewitson Exp $
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12 %
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13 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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14
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15 function varargout = simplify(varargin)
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16
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17 import utils.const.*
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18
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19 %%% Check if this is a call for parameters
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20 if utils.helper.isinfocall(varargin{:})
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21 varargout{1} = getInfo(varargin{3});
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22 return
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23 end
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24
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25 %%% Input objects checks
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26 if nargin < 1
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27 error('### incorrect number of inputs.')
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28 end
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29
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30 % Collect input pzmodels, plists and input variable names
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31 in_names = cell(size(varargin));
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32 for ii = 1:nargin
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33 in_names{end+1} = inputname(ii);
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34 end
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35 [pzms, invars, rest] = utils.helper.collect_objects(varargin(:), 'pzmodel', in_names);
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36 pl = utils.helper.collect_objects(varargin(:), 'plist');
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37
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38 % Combine with default plist
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39 pl = combine(pl, getDefaultPlist('Default'));
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40
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41 % Get tolerance
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42 tol = find(pl,'tol');
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43
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44 % Decide on a deep copy or a modify
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45 cpzms = copy(pzms, nargout);
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46
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47 % Loop over pzmodels and modify the first
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48 for pp=1:numel(cpzms)
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49
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50 % process this pzmodel
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51 pzm = cpzms(pp);
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52
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53 % Loop over the poles and zeros
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54 cancelPoles = [];
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55 for jj=1:numel(pzm.poles)
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56 cancel = false;
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57 for kk=1:numel(pzm.zeros)
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58 if (abs(real(pzm.poles(jj).ri(1))-real(pzm.zeros(kk).ri(1)))<tol...
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59 && abs(imag(pzm.poles(jj).ri(1))-imag(pzm.zeros(kk).ri(1)))<tol)
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60 utils.helper.msg(msg.PROC1, ...
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61 'cancelling pole %s and zero %s', ...
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62 char(pzm.poles(jj)), char(pzm.zeros(kk)));
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63 cancel = true;
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64 break;
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65 end
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66 end
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67 if cancel
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68 cancelPoles = [cancelPoles jj];
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69 pzm.zeros(kk) = [];
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70 end
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71 end
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72 pzm.poles(cancelPoles) = [];
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73
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74 % Add history
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75 pzm.addHistory(getInfo('None'), pl, invars, pzm.hist);
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76 % Set name
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77 pzm.setName(sprintf('simplify(%s)', pzm.name));
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78 end
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79
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80 % Outputs
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81 varargout{1} = cpzms;
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82
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83 end
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84
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85
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86 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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87 % Local Functions %
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88 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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89
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90 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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91 %
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92 % FUNCTION: getInfo
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93 %
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94 % DESCRIPTION: Get Info Object
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95 %
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96 % HISTORY: 11-07-07 M Hewitson
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97 % Creation.
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98 %
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99 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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100
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101 function ii = getInfo(varargin)
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102 if nargin == 1 && strcmpi(varargin{1}, 'None')
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103 sets = {};
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104 pls = [];
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105 elseif nargin == 1&& ~isempty(varargin{1}) && ischar(varargin{1})
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106 sets{1} = varargin{1};
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107 pls = getDefaultPlist(sets{1});
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108 else
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109 sets = {'Default'};
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110 pls = [];
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111 for kk=1:numel(sets)
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112 pls = [pls getDefaultPlist(sets{kk})];
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113 end
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114 end
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115 % Build info object
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116 ii = minfo(mfilename, 'pzmodel', 'ltpda', utils.const.categories.sigproc, '$Id: simplify.m,v 1.12 2011/04/08 08:56:33 hewitson Exp $', sets, pls);
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117 ii.setModifier(false);
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118 end
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119
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120 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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121 %
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122 % FUNCTION: getDefaultPlist
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123 %
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124 % DESCRIPTION: Get Default Plist
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125 %
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126 % HISTORY: 11-07-07 M Hewitson
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127 % Creation.
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128 %
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129 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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130
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131 function plout = getDefaultPlist(set)
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132 persistent pl;
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133 persistent lastset;
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134 if exist('pl', 'var')==0 || isempty(pl) || ~strcmp(lastset, set)
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135 pl = buildplist(set);
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136 lastset = set;
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137 end
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138 plout = pl;
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139 end
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140
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141 function pl = buildplist(set)
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142
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143 pl = plist();
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144
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145 switch lower(set)
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146 case 'default'
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147 p = param({'tol', 'The tolerance for deciding if two poles/zeros are the same.'}, paramValue.DOUBLE_VALUE(1e-10));
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148 pl.append(p);
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149
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150 otherwise
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151 error('### Unknown set [%s]', set);
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152 end
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153 end
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154