annotate m-toolbox/classes/@ssm/respcst.m @ 0:f0afece42f48

Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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1 % RESPCST gives the timewise impulse response of a statespace model.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
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3 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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4 % DESCRIPTION: RESPCST gives the timewise impulse response of a statespace
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Daniele Nicolodi <nicolodi@science.unitn.it>
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5 % model.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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6 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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7 % CALL: [aos ] = respcst(sys, plist_inputs)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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8 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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9 % INPUTS:
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Daniele Nicolodi <nicolodi@science.unitn.it>
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10 % - sys, (array of) ssm object
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Daniele Nicolodi <nicolodi@science.unitn.it>
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11 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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12 % plist with parameters 'inputs', 'states' and 'outputs' to indicate which
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Daniele Nicolodi <nicolodi@science.unitn.it>
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13 % inputs, states and outputs variables are taken in account. This requires
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Daniele Nicolodi <nicolodi@science.unitn.it>
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14 % proper variable naming. If a variable called appears more that once it
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Daniele Nicolodi <nicolodi@science.unitn.it>
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15 % will be used once only.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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16 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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17 % OUTPUTS:
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Daniele Nicolodi <nicolodi@science.unitn.it>
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18 % - aos the timewise response (one for each input)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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19 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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20 % <a href="matlab:utils.helper.displayMethodInfo('ssm', 'respcst')">Parameters Description</a>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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21 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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22 % VERSION: $Id: respcst.m,v 1.8 2011/04/08 08:56:23 hewitson Exp $
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Daniele Nicolodi <nicolodi@science.unitn.it>
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23 %
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Daniele Nicolodi <nicolodi@science.unitn.it>
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24 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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Daniele Nicolodi <nicolodi@science.unitn.it>
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25
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Daniele Nicolodi <nicolodi@science.unitn.it>
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26 function varargout = respcst(varargin)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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27 %% starting initial checks
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Daniele Nicolodi <nicolodi@science.unitn.it>
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28 % Check if this is a call for parameters
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Daniele Nicolodi <nicolodi@science.unitn.it>
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29 if utils.helper.isinfocall(varargin{:})
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Daniele Nicolodi <nicolodi@science.unitn.it>
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30 varargout{1} = getInfo(varargin{3});
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Daniele Nicolodi <nicolodi@science.unitn.it>
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31 return
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Daniele Nicolodi <nicolodi@science.unitn.it>
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32 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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33
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Daniele Nicolodi <nicolodi@science.unitn.it>
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34 utils.helper.msg(utils.const.msg.MNAME, ['running ', mfilename]);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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35
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Daniele Nicolodi <nicolodi@science.unitn.it>
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36 % checking number of inputs work data
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Daniele Nicolodi <nicolodi@science.unitn.it>
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37 in_names = cell(size(varargin));
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Daniele Nicolodi <nicolodi@science.unitn.it>
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38 for ii = 1:nargin,in_names{ii} = inputname(ii);end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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39
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Daniele Nicolodi <nicolodi@science.unitn.it>
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40 [sys, ssm_invars, rest] = utils.helper.collect_objects(varargin(:), 'ssm', in_names);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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41 [pl, ssm_invars2, rest] = utils.helper.collect_objects(rest(:), 'plist', in_names);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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42 if ~isempty(rest)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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43 pl = combine(pl, plist(rest{:}));
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Daniele Nicolodi <nicolodi@science.unitn.it>
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44 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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45 pl = combine(pl, getDefaultPlist());
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Daniele Nicolodi <nicolodi@science.unitn.it>
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46
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Daniele Nicolodi <nicolodi@science.unitn.it>
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47
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Daniele Nicolodi <nicolodi@science.unitn.it>
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48 %% begin function body
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Daniele Nicolodi <nicolodi@science.unitn.it>
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49 if numel(sys)>1
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Daniele Nicolodi <nicolodi@science.unitn.it>
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50 error('ssm/respcst only works with a single statespace model.')
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Daniele Nicolodi <nicolodi@science.unitn.it>
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51 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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52
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Daniele Nicolodi <nicolodi@science.unitn.it>
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53 if ~sys.isnumerical
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Daniele Nicolodi <nicolodi@science.unitn.it>
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54 error('The input system should be numeric.')
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Daniele Nicolodi <nicolodi@science.unitn.it>
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55 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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56
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Daniele Nicolodi <nicolodi@science.unitn.it>
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57 %% modifying input ssm
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Daniele Nicolodi <nicolodi@science.unitn.it>
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58 if sys.timestep == 0
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Daniele Nicolodi <nicolodi@science.unitn.it>
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59 sys = copy(sys, true);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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60 sys.modifyTimeStep(0.1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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61 warning('Warning : time-continuous ssm was discretized with a time-step of 0.1s per default') %#ok<WNTAG>
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Daniele Nicolodi <nicolodi@science.unitn.it>
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62 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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63
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Daniele Nicolodi <nicolodi@science.unitn.it>
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64 %% getting duration of the response
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Daniele Nicolodi <nicolodi@science.unitn.it>
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65 tmax = find(pl, 'tmax');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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66 if sys.isStable && (tmax == -1)
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Daniele Nicolodi <nicolodi@science.unitn.it>
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67 pl_s = settlingTime(sys, pl);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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68 timeMax = min(find(pl_s, 'SETTLING_TIME'), 1e5);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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69 timeMax = 2^nextPow2( 12* timeMax);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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70 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
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71 timeMax = 2^nextPow2( tmax./sys.timestep);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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72 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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73
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Daniele Nicolodi <nicolodi@science.unitn.it>
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74 %% deriving and initializing matrices
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Daniele Nicolodi <nicolodi@science.unitn.it>
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75 if find(pl, 'reorganize')
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Daniele Nicolodi <nicolodi@science.unitn.it>
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76 sys = copy(sys, true);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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77 sys = reorganize(sys, pl, 'set', 'for resp', 'internal', 'internal');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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78 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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79
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Daniele Nicolodi <nicolodi@science.unitn.it>
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80 A = sys.amats{1,1};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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81 B = sys.bmats{1,1};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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82 C = sys.cmats{2,1};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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83 Cstates = sys.cmats{1,1};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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84 D = sys.dmats{2,1};
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Daniele Nicolodi <nicolodi@science.unitn.it>
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85 Ts = sys.timestep;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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86 Dstates = zeros(size(Cstates,1), size(D,2));
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Daniele Nicolodi <nicolodi@science.unitn.it>
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87 Dtot = [Dstates; D];
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Daniele Nicolodi <nicolodi@science.unitn.it>
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88
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Daniele Nicolodi <nicolodi@science.unitn.it>
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89 Ninputs = size(B,2);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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90 Noutputs = size(C,1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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91 Nss = size(A,1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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92 NssOut = size(Cstates,1);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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93
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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94 %% collecting data before saving in loop
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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95 aos = ao.initObjectWithSize(Noutputs+NssOut, Ninputs);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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96 myinfo = getInfo('None');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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97 inhist = sys.hist;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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98
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Daniele Nicolodi <nicolodi@science.unitn.it>
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99 inputType = find(pl, 'response');
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Daniele Nicolodi <nicolodi@science.unitn.it>
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100
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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101
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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102 for ii=1:Ninputs
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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103 sys_ss = ss(A, B(:,ii), [Cstates; C], Dtot(:,ii), Ts);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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104
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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105 %% depending on user option, compute response for one input only
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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106 if strcmpi( inputType, 'IMPULSE')
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Daniele Nicolodi <nicolodi@science.unitn.it>
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107 Y = impulse(sys_ss, 1:Ts:(timeMax*Ts));
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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108 elseif strcmpi( inputType, 'STEP')
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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109 Y = step(sys_ss, 1:Ts:(timeMax*Ts));
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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110 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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111 error(['Option ''response'' does not accept the value' inputType]);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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112 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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113
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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114 %% storing responsei in aos for one input only
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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115
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Daniele Nicolodi <nicolodi@science.unitn.it>
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116 for oo=1:NssOut;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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117 aos(oo,ii).setData(tsdata( Y(:,oo), 1/Ts));
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Daniele Nicolodi <nicolodi@science.unitn.it>
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118 aos(oo,ii).setName([sys.inputs(1).ports(ii).name '->' sys.outputs(1).ports(oo).name]);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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119 aos(oo,ii).setXunits('s');
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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120 aos(oo,ii).setYunits(sys.outputs(1).ports(oo).units);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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121 aos(oo,ii).setDescription([inputType ' response from input ' , sys.inputs(1).ports(ii).name , 'to output ', sys.outputs(1).ports(oo).name]);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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122 aos(oo,ii).setT0(sys.timestep);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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123 aos(oo,ii).addHistory(myinfo, pl , {''}, inhist );
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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124 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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125 for oo=1:Noutputs;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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126 aos(NssOut+oo,ii).setData(tsdata( Y(:,NssOut+oo), 1/Ts));
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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127 aos(NssOut+oo,ii).setName([sys.inputs(1).ports(ii).name '->' sys.outputs(2).ports(oo).name]);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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128 aos(NssOut+oo,ii).setXunits('s');
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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129 aos(NssOut+oo,ii).setYunits(sys.outputs(2).ports(oo).units);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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130 aos(NssOut+oo,ii).setDescription([inputType ' response from input ' , sys.inputs(1).ports(ii).name , 'to output ', sys.outputs(2).ports(oo).name]);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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131 aos(NssOut+oo,ii).setT0(sys.timestep);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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132 aos(NssOut+oo,ii).addHistory(myinfo, pl , {''}, inhist );
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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133 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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134 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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135
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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136 %% Set output depending on nargout
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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137 if nargout == numel(aos)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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138 for jj=1:nargout
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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139 varargout{jj} = aos(jj);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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140 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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141 elseif nargout == 1;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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142 varargout{1} = aos;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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143 elseif nargout == 0;
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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144 iplot(aos);
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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145 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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146 error('Wrong number of outputs')
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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147 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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148 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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149
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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150 %--------------------------------------------------------------------------
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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151 % Get Info Object
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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152 %--------------------------------------------------------------------------
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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153 function ii = getInfo(varargin)
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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154
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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155 if nargin == 1 && strcmpi(varargin{1}, 'None')
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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156 sets = {};
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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157 pl = [];
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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158 else
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Daniele Nicolodi <nicolodi@science.unitn.it>
parents:
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159 sets = {'Default'};
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160 pl = getDefaultPlist;
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161 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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162 % Build info object
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163 ii = minfo(mfilename, 'ssm', 'ltpda', utils.const.categories.sigproc, '$Id: respcst.m,v 1.8 2011/04/08 08:56:23 hewitson Exp $', sets, pl);
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164 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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165
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166 %--------------------------------------------------------------------------
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167 % Get Default Plist
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168 %--------------------------------------------------------------------------
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169
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Daniele Nicolodi <nicolodi@science.unitn.it>
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170 function pl = getDefaultPlist()
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Daniele Nicolodi <nicolodi@science.unitn.it>
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171 pl = ssm.getInfo('reorganize', 'for resp').plists;
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Daniele Nicolodi <nicolodi@science.unitn.it>
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172 pl.remove('set');
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173
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174 p = param({'response', 'Specify the type of response wanted'},{1, {'impulse', 'step'}, paramValue.SINGLE} );
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Daniele Nicolodi <nicolodi@science.unitn.it>
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175 pl.append(p);
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176
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177 p = param({'tmax', 'Specify the duration of response wanted [s] (automatically set if not specified by user, and system is stable)'},-1 );
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178 pl.append(p);
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179
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180 p = param({'reorganize', 'When set to 0, this means the ssm does not need be modified to match the requested i/o. Faster but dangerous!'}, paramValue.TRUE_FALSE);
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181 pl.append(p);
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Daniele Nicolodi <nicolodi@science.unitn.it>
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182
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Daniele Nicolodi <nicolodi@science.unitn.it>
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183
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184 end
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Daniele Nicolodi <nicolodi@science.unitn.it>
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185