Mercurial > hg > ltpda

annotate m-toolbox/classes/+utils/@mysql/getAOsInTimeSpan.m @ 44:409a22968d5e default

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Add unit tests
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Tue, 06 Dec 2011 18:42:11 +0100
parents f0afece42f48
children
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % GETAOSINTIMESPAN performs high-level queries to retrieve AOs from an LTPDA repository.
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: GETAOSINTIMESPAN performs high-level queries to retrieve AOs
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Daniele Nicolodi <nicolodi@science.unitn.it>
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5 % from an LTPDA repository. The AOs for that channel in that time-span
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6 % are joined together and then split on the requested
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Daniele Nicolodi <nicolodi@science.unitn.it>
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7 % interval. The resulting AO covers the requested interval,
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Daniele Nicolodi <nicolodi@science.unitn.it>
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8 % assuming that the repositoy contains a contiguos set of AOs
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9 % spanning the requested time.
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10 %
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11 % CALL: b = getAOsInTimeSpan(pl)
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12 %
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13 % INPUTS: pl - a plist containing parameters as described below
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14 %
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15 % OUTPUTS: b - a vector of AOs resulting from the query
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16 %
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17 % PARAMETERS:
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18 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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19 % choose from
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20 % 'hostname' - hostname/IP address of LTPDA Repository
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21 % 'database' - the name of the database to query
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22 % or
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23 % 'conn' - a database connection object
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24 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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25 % in addition, we need
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26 % 'binary' - retrieve binary data (true or false)
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27 % 'channels' - a cell array of AO names
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28 % 'timespan' - a timespan object to specify the
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29 % time-interval of interest
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30 %
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31 % The timespan is applied start <= data < end.
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32 %
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33 % OPTIONAL PARAMETERS:
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34 %
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35 % further restrict the search with the following conditions
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36 %
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37 % 'username' - specify the username of the person who
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Daniele Nicolodi <nicolodi@science.unitn.it>
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38 % submitted the AO
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39 % 'submitted' - specify the date the AO was submitted
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40 %
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41 % EXAMPLES:
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42 %
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43 % 1) Find all AOs which are called 'ChannelX' submitted after 1st May 2007
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44 %
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45 % pl = plist('hostname', 'localhost', 'database', 'ltpda_test', ...
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46 % 'channels', {'channelX'}, ...
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47 % 'timespan', timespan('2007-05-01 00:00:00', '3000-01-01 12:34:50', ...
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48 % );
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49 %
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50 % a = getAOsInTimeSpan(pl);
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51 %
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52 % 2) Find all AOs for ChannelX and ChannelY on 1st May 2007 submitted by
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53 % hewitson
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54 %
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55 % pl = plist('hostname', 'localhost', 'database', 'ltpda_test', ...
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56 % 'channels', {'channelX'}, ...
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57 % 'timespan', timespan('2007-05-01 00:00:00', '2007-05-02 00:00:00', ...
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58 % 'username', 'hewitson');
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59 %
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60 % a = getAOsInTimeSpan(pl);
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61 %
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62 % VERSION: $Id: getAOsInTimeSpan.m,v 1.3 2010/01/22 12:46:08 ingo Exp $
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63 %
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64 % HISTORY: 25-02-08 M Hewitson
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Daniele Nicolodi <nicolodi@science.unitn.it>
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65 % Creation
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66 %
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67 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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68
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69 function varargout = getAOsInTimeSpan(varargin)
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70
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71 error('### Obsolete as of LTPDA version 2.2. Replaced my AO model retrieve_in_timespan');
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72 % Collect input ao's, plist's and ao variable names
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73 in_names = {};
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74 for ii = 1:nargin
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75 in_names{end+1} = inputname(ii);
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76 end
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77 [pl, pl_invars] = utils.helper.collect_objects(varargin(:), 'plist', in_names);
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78
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79 % Process the input plist
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80 conn = find(pl, 'conn');
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81 hostname = find(pl, 'hostname');
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82 database = find(pl, 'database');
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83 channels = find(pl, 'channels');
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84 tspan = find(pl, 'timespan');
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85 useBinary = find(pl, 'binary');
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86
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87 % Check inputs
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88 if isempty(hostname) || ~ischar(hostname)
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89 if isempty(conn) || ~isa(conn, 'database')
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90 error(sprintf('### Plist should contain ''hostname'' and ''database'' parameters,\n or a ''conn'' parameter.'));
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91 end
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92 end
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93 if isempty(database) || ~ischar(database)
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94 if isempty(conn) || ~isa(conn, 'database')
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95 error(sprintf('### Plist should contain ''hostname'' and ''database'' parameters,\n or a ''conn'' parameter.'));
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96 end
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97 end
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98 if isempty(channels)
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99 error('### Plist should contain a ''channels'' parameter.');
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100 end
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101 if isempty(tspan) || ~isa(tspan, 'timespan')
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102 error('### Plist should contain a ''timespan'' parameter.');
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103 end
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104
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105 % Check the channels value is a cell
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106 if ~iscell(channels)
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107 channels = {channels};
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108 end
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109
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110 % Get a connection to the database
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111 iConnected = 0;
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112 if ~isa(conn, 'database')
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113 % then we connect
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114 try
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115 conn = utils.mysql.connect(hostname, database);
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116 iConnected = 1;
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117 catch
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118 error('### Failed to connect to server: %s/%s', hostname, database);
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119 end
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120 end
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121
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122 % Collect the data
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123 try
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124 aout = hlq(conn, channels, tspan, useBinary);
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125 catch
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126 lasterr
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127 % Do we need to close database connection?
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128 if iConnected
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129 close(conn);
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130 end
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131 error('### Error retrieving objects.');
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132 end
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133
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134 % Do we need to close database connection?
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135 if iConnected
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136 close(conn);
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137 end
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138
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139 % set outputs
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140 varargout{1} = aout;
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141 end
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142
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143 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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144 % A prototype for the kind of high-level query functions we might need
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145 function objsOut = hlq(conn, channels, ts, useBinary)
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146
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147 % prepare output
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148 objsOut = [];
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149
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150 % Loop over the channels
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151 for j=1:length(channels)
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152
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153 % this channel
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154 channel = channels{j};
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155
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156 % the query
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157 q = ['select objmeta.obj_id from objmeta,ao,tsdata ' ...
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158 'where objmeta.obj_id=ao.obj_id ' ...
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159 'and ao.data_id=tsdata.id ' ...
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160 sprintf('and objmeta.name=''%s''', channel) ...
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161 sprintf('and tsdata.t0+INTERVAL tsdata.nsecs SECOND >= ''%s''', char(ts.startT)) ...
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162 sprintf('and tsdata.t0 <= ''%s''', char(ts.endT))];
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163
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164 % execute query
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165 info = utils.mysql.dbquery(conn, q);
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166
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167 % collect objects
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168 if useBinary
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169 objs = ltpda_uo.retrieve(conn, 'binary', [info{:}]);
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170 else
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171 objs = ltpda_uo.retrieve(conn, [info{:}]);
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172 end
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173
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174 % join these up
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175 ojn = join([objs{:}]);
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176
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177 % split out the bit we want
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178 os = split(ojn, plist('split_type', 'interval', 'timespan', ts));
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179
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180 % add to outputs
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181 objsOut = [objsOut os];
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182 end % end loop over channels
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183 end
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184
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185 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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186 % Returns the default plist
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187 function pl = getDefaultPlist(varargin)
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188
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189 pl = plist('hostname', 'localhost', ...
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190 'database', 'ltpda_test', ...
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191 'channels', {'chan1', 'chan2'}, ...
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192 'timespan', timespan('1970-01-01 00:00:00', '2010-10-12 12:45:32') ...
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Daniele Nicolodi <nicolodi@science.unitn.it>
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193 );
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194 end
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195
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Daniele Nicolodi <nicolodi@science.unitn.it>
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196