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annotate m-toolbox/classes/@parfrac/getlowerFreq.m @ 18:947e2ff4b1b9 database-connection-manager

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Update plist.FROM_REPOSITORY_PLIST and plist.TO_REPOSITORY_PLIST
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 % GETLOWERFREQ gets the frequency of the lowest pole in the model.
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: GETLOWERFREQ gets the frequency of the lowest pole in the
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5 % model.
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6 %
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7 % CALL: f = getlowerFreq(pf);
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8 %
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9 % <a href="matlab:utils.helper.displayMethodInfo('parfrac', 'getlowerFreq')">Parameters Description</a>
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10 %
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11 % VERSION: $Id: getlowerFreq.m,v 1.10 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 = getlowerFreq(varargin)
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16
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17 %%% Check if this is a call for parameters
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18 if utils.helper.isinfocall(varargin{:})
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19 varargout{1} = getInfo(varargin{3});
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20 return
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21 end
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22
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23 % Some input checking
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24 if length(varargin) > 1 || length(varargin{1}) > 1
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25 error('### This method works only with one input.');
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26 end
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27
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28 pf = varargin{1};
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29 pls = pf.poles;
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30 np = length(pls);
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31 f = inf;
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32 for jj=1:np
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33 fp = sqrt(real(pls(jj))^2 + imag(pls(jj))^2)/(2*pi);
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34 if fp < f
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35 f = fp;
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36 end
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37 end
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38
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39 % Set outputs
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40 varargout{1} = f;
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41 end
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42
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43 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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44 % Local Functions %
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45 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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46
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47 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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48 %
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49 % FUNCTION: getInfo
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50 %
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51 % DESCRIPTION: Get Info Object
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52 %
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53 % HISTORY: 11-07-07 M Hewitson
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54 % Creation.
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55 %
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56 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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57
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58 function ii = getInfo(varargin)
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59 if nargin == 1 && strcmpi(varargin{1}, 'None')
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60 sets = {};
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61 pl = [];
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62 else
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63 sets = {'Default'};
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64 pl = getDefaultPlist;
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65 end
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66 % Build info object
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67 ii = minfo(mfilename, 'parfrac', 'ltpda', utils.const.categories.internal, '$Id: getlowerFreq.m,v 1.10 2011/04/08 08:56:33 hewitson Exp $', sets, pl);
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68 ii.setModifier(false);
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69 end
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70
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71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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72 %
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73 % FUNCTION: getDefaultPlist
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74 %
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75 % DESCRIPTION: Get Default Plist
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76 %
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77 % HISTORY: 11-07-07 M Hewitson
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78 % Creation.
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79 %
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80 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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81
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82 function plout = getDefaultPlist()
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83 persistent pl;
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84 if exist('pl', 'var')==0 || isempty(pl)
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85 pl = buildplist();
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86 end
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87 plout = pl;
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88 end
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89
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90 function pl = buildplist()
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91 pl = plist.EMPTY_PLIST;
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92 end
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93