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annotate m-toolbox/classes/@matrix/fftfilt.m @ 35:4be5f7a5316f 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 % FFTFILT fft filter for matrix objects
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: FFTFILT fft filter for matrix objects
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5 %
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6 % CALL: output = fftfilt(input,filter)
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7 %
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8 % <a href="matlab:utils.helper.displayMethodInfo('matrix', 'fftfilt')">Parameters Description</a>
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9 %
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10 % VERSION: $Id: fftfilt.m,v 1.16 2011/04/08 08:56:31 hewitson Exp $
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11 %
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12 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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13 function varargout = fftfilt(varargin)
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14
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15 % utils.helper.msg(msg.PROC3, 'running %s/%s', mfilename('class'), mfilename);
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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 % Collect input variable names
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24 in_names = cell(size(varargin));
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25 for ii = 1:nargin
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26 in_names{ii} = inputname(ii);
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27 end
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28
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29 % Collect all smodels and plists
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30 % [as, matrix_invars, rest] = utils.helper.collect_objects(varargin(:), 'matrix', in_names);
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31 [pl, pl_invars, rest] = utils.helper.collect_objects(varargin(:), 'plist', in_names);
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32
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33 % Merge with default plist
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34 pl = parse(pl, getDefaultPlist);
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35
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36 % separate data and filter matrices
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37 is = varargin{1};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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38 filt = varargin{2};
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39
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40 [rw1,cl1] = size(filt.objs); % size filter
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41 [rw2,cl2] = size(is.objs); % size input signals
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42 % consistency check
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43 if (cl1 ~= rw2)
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44 error('!!! Matrices inner dimensions must agree')
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45 end
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46
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47 % init output
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48 nobjs = feval(sprintf('%s.initObjectWithSize', class(is.objs(1))), rw1, cl2);
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49 os = matrix(nobjs,plist('shape',[rw1,cl2]));
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50
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51 % get number of Bins for zero padding
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52 Npad = find(pl,'Npad');
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53 % do row by colum product
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54 for kk = 1:rw1
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55 for jj = 1:cl2
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56 % fix the first element of the sum
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57 try % try to do filter
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58 tobj = fftfilt_core(copy(is.objs(1,jj),1), copy(filt.objs(kk,1),1), Npad);
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59 catch ME % if the input ao is empty, ao/filter output an error and tobj is set to []
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60 tobj = [];
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61 end
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62 for zz = 2:cl1
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63 try % try to do filter
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64 if isempty(tobj)
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65 tobj = fftfilt_core(copy(is.objs(zz,jj),1), copy(filt.objs(kk,zz),1), Npad);
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66 else
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67 tobj = tobj + fftfilt_core(copy(is.objs(zz,jj),1), copy(filt.objs(kk,zz),1), Npad);
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68 end
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69 catch ME % if the input ao is empty, ao/filter output an error
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70 end
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71 end
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72 % simplify y units
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73 tobj_yu = tobj.yunits;
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74 tobj_yu.simplify;
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75 tobj.setYunits(tobj_yu);
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76 % simplify x units
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77 if ~isempty(tobj.xunits)
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78 tobj_xu = tobj.xunits;
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79 tobj_xu.simplify;
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80 tobj.setXunits(tobj_xu);
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81 end
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82 os.objs(kk,jj) = tobj;
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83 end
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84 end
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85
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86 if nargout == 1
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87 varargout{1} = os;
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88 else
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89 error('Set at least one output value')
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90 end
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91
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92 end
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93
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94 %--------------------------------------------------------------------------
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95 % Get Info Object
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96 %--------------------------------------------------------------------------
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97 function ii = getInfo(varargin)
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98
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99 if nargin == 1 && strcmpi(varargin{1}, 'None')
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100 sets = {};
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101 pls = [];
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102 else
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103 sets = {'Default'};
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104 pls = getDefaultPlist;
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105 end
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106 % Build info object
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107 ii = minfo(mfilename, 'matrix', 'ltpda', utils.const.categories.op, '$Id: fftfilt.m,v 1.16 2011/04/08 08:56:31 hewitson Exp $', sets, pls);
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108 ii.setModifier(false);
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109 end
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110
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111 %--------------------------------------------------------------------------
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112 % Get Default Plist
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113 %--------------------------------------------------------------------------
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114 function plout = getDefaultPlist()
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115 persistent pl;
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116 if exist('pl', 'var')==0 || isempty(pl)
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117 pl = buildplist();
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118 end
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119 plout = pl;
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120 end
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121
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122 function pl = buildplist()
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123 pl = plist();
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124
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125 % Number of bins for zero padding
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126 p = param({'Npad', 'Number of bins for zero padding.'}, paramValue.EMPTY_DOUBLE);
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127 pl.append(p);
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128
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129 end