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annotate m-toolbox/classes/@plist/getSetRandState.m @ 41:6def6533cb16 database-connection-manager

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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 18:04:34 +0100
parents f0afece42f48
children
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % GETSETRANDSTATE gets or sets the random state of the MATLAB functions 'rand' and 'randn'
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: GETSETRANDSTATE gets or sets the random state of the MATLAB
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5 % functions 'rand' and 'randn'. This function looks in the
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Daniele Nicolodi <nicolodi@science.unitn.it>
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6 % input plist for the key-word 'rand_state' (LTPDA toolbox
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Daniele Nicolodi <nicolodi@science.unitn.it>
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7 % less than 2.1) or 'rand_stream' (LTPDA toolbox greate equal
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Daniele Nicolodi <nicolodi@science.unitn.it>
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8 % than 2.1) to set the random state. If these key words
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Daniele Nicolodi <nicolodi@science.unitn.it>
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9 % doesn't exist in the plist then stores this function the
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Daniele Nicolodi <nicolodi@science.unitn.it>
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10 % random state in the plist.
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11 %
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12 % CALL: pl = getSetRandState(pl_in);
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13 % pl = pl_in.getSetRandState();
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Daniele Nicolodi <nicolodi@science.unitn.it>
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14 % pl_in.getSetRandState();
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15 %
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16 % <a href="matlab:utils.helper.displayMethodInfo('plist', 'getSetRandState')">Parameters Description</a>
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17 %
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18 % VERSION: $Id: getSetRandState.m,v 1.10 2011/08/15 10:42:00 hewitson Exp $
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19 %
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20 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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21
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22 function varargout = getSetRandState(varargin)
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23
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24 %%% Check if this is a call for parameters
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Daniele Nicolodi <nicolodi@science.unitn.it>
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25 if utils.helper.isinfocall(varargin{:})
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26 varargout{1} = getInfo(varargin{3});
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27 return
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28 end
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29
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Daniele Nicolodi <nicolodi@science.unitn.it>
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30 % Collect all PLISTs
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31 plin = utils.helper.collect_objects(varargin(:), 'plist');
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32
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33 % Decide on a deep copy or a modify
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34 plout = copy(plin, nargout);
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35
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36 if numel(plout) ~= 1
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Daniele Nicolodi <nicolodi@science.unitn.it>
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37 error('### This method accepts only one input plist object.');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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38 end
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39
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40 def_struct = struct('Type', '', ...
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41 'NumStreams', [], ...
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42 'StreamIndex', [], ...
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43 'Substream', 1, ...
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44 'Seed', 0, ...
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45 'State', [], ...
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46 'RandnAlg', '', ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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47 'Antithetic', false, ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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48 'FullPrecision', true);
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49
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Daniele Nicolodi <nicolodi@science.unitn.it>
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50 rand_state = plout.find('rand_state');
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51 rand_stream = plout.find('rand_stream');
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52
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Daniele Nicolodi <nicolodi@science.unitn.it>
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53 %%% We have different behavior for the MATLAB version 2008b and less than
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Daniele Nicolodi <nicolodi@science.unitn.it>
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54 %%% version 2008b because version 2008b is working with random streams.
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55
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56 %%% MATLAB version 2008a and less
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57 if verLessThan('MATLAB', '7.7')
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58 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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59 %%% MATLAB version 2008a and less %%%
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60 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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61
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62 if ~isempty(rand_state)
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63 %%% Reset random state %%%
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64
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Daniele Nicolodi <nicolodi@science.unitn.it>
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65 %%% It might be that 'rand_state' contains the 'state' or the 'seed'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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66 %%% of the MATLAB rand or randn methods.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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67 try
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Daniele Nicolodi <nicolodi@science.unitn.it>
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68 randn('seed',rand_state);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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69 rand('seed', rand_state);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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70 catch
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71 if numel(rand_state) > 2
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72 rand('state', rand_state)
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73 else
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74 randn('state', rand_state)
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75 end
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76 end
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77 plout.remove('rand_state');
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78 plout.getSetRandState();
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79
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80 elseif ~isempty(rand_stream)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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81 %%% Reset random state %%%
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82
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83 %%% Legacy mode
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84 if numel(rand_stream) ~= 1
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85 %%% Set that of 'randn'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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86 randn('state', rand_stream(1).State)
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87 %%% Set that of 'rand'
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88 rand('state', rand_stream(2).State)
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89 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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90 error('### I have no idea what I should do because the random state is stores as a random stream with MATLAB version 2008b or later.')
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91 end
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92
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93 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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94 %%% Store random state %%%
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95
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96 stream = [def_struct def_struct];
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97 %%% Store state of 'randn'
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98 stream(1).Type = 'randn';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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99 stream(1).State = randn('state');
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100 %%% Store state of 'rand'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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101 stream(2).Type = 'rand';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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102 stream(2).State = rand('state');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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103 plout.append('rand_stream', stream);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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104 end
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105
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106 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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107 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
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108 %%% MATLAB version 2008b and later %%%
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109 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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110
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111 def_stream = RandStream.getDefaultStream;
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112
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113 if ~isempty(rand_state)
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114 %%% Reset random state %%%
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115
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116 %%% It might be that 'rand_state' contains the 'state' or the 'seed'
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117 %%% of the MATLAB rand or randn methods.
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118 try
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119 randn('seed',rand_state);
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120 rand('seed', rand_state);
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121 catch
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122 if numel(rand_state) > 2
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123 rand('state', rand_state)
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124 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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125 randn('state', rand_state)
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126 end
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127 end
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128 plout.remove('rand_state');
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129 plout.getSetRandState();
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130
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131 elseif ~isempty(rand_stream)
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132 %%% Reset random state %%%
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133
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134 %%% Legacy mode
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Daniele Nicolodi <nicolodi@science.unitn.it>
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135 if numel(rand_stream) ~= 1
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Daniele Nicolodi <nicolodi@science.unitn.it>
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136
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Daniele Nicolodi <nicolodi@science.unitn.it>
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137 %%% Set that of 'randn'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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138 randn('state', rand_stream(1).State)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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139 %%% Set that of 'rand'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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140 rand('state', rand_stream(2).State)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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141 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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142 stream = RandStream(rand_stream.Type, 'Seed', rand_stream.Seed, 'RandnAlg', rand_stream.RandnAlg);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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143 stream.State = uint32(rand_stream.State);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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144 stream.Substream = rand_stream.Substream;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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145 stream.Antithetic = rand_stream.Antithetic;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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146 stream.FullPrecision = rand_stream.FullPrecision;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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147 RandStream.setDefaultStream(stream);
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148 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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149
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Daniele Nicolodi <nicolodi@science.unitn.it>
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150 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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151 %%% Store random state %%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
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152
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Daniele Nicolodi <nicolodi@science.unitn.it>
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153 if strcmp(def_stream.Type, 'legacy')
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Daniele Nicolodi <nicolodi@science.unitn.it>
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154 %%%%%%%%%% Legacy Mode %%%%%%%%%%
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155
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Daniele Nicolodi <nicolodi@science.unitn.it>
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156 stream = [def_struct def_struct];
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Daniele Nicolodi <nicolodi@science.unitn.it>
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157 %%% Store state of 'randn'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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158 stream(1).Type = 'randn';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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159 stream(1).State = randn('state');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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160 %%% Store state of 'rand'
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Daniele Nicolodi <nicolodi@science.unitn.it>
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161 stream(2).Type = 'rand';
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Daniele Nicolodi <nicolodi@science.unitn.it>
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162 stream(2).State = rand('state');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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163
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Daniele Nicolodi <nicolodi@science.unitn.it>
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164 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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165 %%%%%%%%%% Stream Mode %%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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166 stream = def_struct;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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167 stream.Type = def_stream.Type;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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168 stream.NumStreams = def_stream.NumStreams;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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169 stream.StreamIndex = def_stream.StreamIndex;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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170 stream.Substream = def_stream.Substream;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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171 stream.Seed = def_stream.Seed;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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172 stream.State = double(def_stream.State);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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173 stream.RandnAlg = def_stream.RandnAlg;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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174 stream.Antithetic = def_stream.Antithetic;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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175 stream.FullPrecision = def_stream.FullPrecision;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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176 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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177 plout.pset('rand_stream', stream);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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178 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
179
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
180
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
181 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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182
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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183 varargout{1} = plout;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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184 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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185
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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186 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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187 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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188 % FUNCTION: getInfo
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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189 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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190 % DESCRIPTION: Get Info Object
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
191 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
192 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
193
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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194 function ii = getInfo(varargin)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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195 if nargin == 1 && strcmpi(varargin{1}, 'None')
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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196 sets = {};
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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197 pl = [];
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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198 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
199 sets = {'Default'};
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
200 pl = getDefaultPlist;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
201 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
202 % Build info object
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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203 ii = minfo(mfilename, 'plist', 'ltpda', utils.const.categories.internal, '$Id: getSetRandState.m,v 1.10 2011/08/15 10:42:00 hewitson Exp $', sets, pl);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
204 ii.setArgsmin(1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
205 ii.setArgsmax(1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
206 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
207
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
208 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
209 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
210 % FUNCTION: getDefaultPlist
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
211 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
212 % DESCRIPTION: Get Default Plist
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
213 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
214 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
215
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
216 function plo = getDefaultPlist()
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
217 plo = plist();
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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218 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
diff changeset
219