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−% REMOVEEMPTYBLOCKS enables to do model simplification
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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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−%
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−%
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−% DESCRIPTION: REMOVEEMPTYBLOCKS allows you to eliminate input/state/output variables.
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−%
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−% CALL:        [ssm] = REMOVEEMPTYBLOCKS(ssm, pl);
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−%
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−% INPUTS :
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−%             ssm     - a ssm object
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−%                  pl - an option plist
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−%
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−% OPTIONS :
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−% plist with parameters 'inputs', 'states' and 'outputs' to indicate which
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−% inputs, states and outputs variables are taken in account. This requires
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−% proper variable naming. If a variable called appears more that once it
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−% will be used once only.
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−%
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−% OUTPUTS:
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−%           The output array are of size Nsys*Noptions
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−%           sys_out -  (array of) ssm objects without the specified information
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−%
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−%
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−% <a href="matlab:utils.helper.displayMethodInfo('ssm', 'removeEmptyBlocks')">Parameters Description</a>
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−%
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−% VERSION: $Id: removeEmptyBlocks.m,v 1.2 2011/07/29 13:46:09 ferran Exp $
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−% 
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−%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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−
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−function varargout = removeEmptyBlocks(varargin)
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−  
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−  import utils.const.*
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−  utils.helper.msg(msg.PROC3, 'running %s/%s', mfilename('class'), mfilename);
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−  %% starting initial checks
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−  
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−  % Check if this is a call for parameters
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−  if utils.helper.isinfocall(varargin{:})
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−    varargout{1} = getInfo(varargin{3});
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−    return
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−  end
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−  
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−  % Collect input variable names
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−  in_names = cell(size(varargin));
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−  for ii = 1:nargin,in_names{ii} = inputname(ii);end
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−  
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−  % Collect all SSMs and plists
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−  [sys, ssm_invars, rest] = utils.helper.collect_objects(varargin(:), 'ssm', in_names);
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−  [pl, invars2, rest]  = utils.helper.collect_objects(rest(:), 'plist');
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−  if ~isempty(rest)
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−    pl = combine(pl, plist(rest{:}));
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−  end
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−  pl = combine(pl, getDefaultPlist);
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−  
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−  Nsys     = numel(sys);
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−  if Nsys ~= 1
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−    error('### Please input (only) one SSM model');
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−  end
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−  
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−  % Decide on a deep copy or a modify, depending on the output
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−  sys = copy(sys, nargout);
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−  
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−  %% begin function body
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−  
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−  % Loop over input systems
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−  for i_sys=1:Nsys
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−    %% retrieving system data
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−    inputSizes = sys(i_sys).inputsizes;
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−    statesSizes = sys(i_sys).statesizes;
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−    outputSizes = sys(i_sys).outputsizes;
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−    keepInputs = inputSizes>0;
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−    keepStates = statesSizes>0;
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−    keepOutputs = outputSizes>0;
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−    %% selecting data
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−    sys.amats = sys.amats(keepStates, keepStates);
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−    sys.bmats = sys.bmats(keepStates, keepInputs);
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−    sys.cmats = sys.cmats(keepOutputs, keepStates);
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−    sys.dmats = sys.dmats(keepOutputs, keepInputs);
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−    sys.inputs = sys.inputs(keepInputs);
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−    sys.states = sys.states(keepStates);
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−    sys.outputs = sys.outputs(keepOutputs);
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−    %% updating size fields
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−    sys(i_sys).addHistory(ssm.getInfo(mfilename), pl , ssm_invars(i_sys), sys(i_sys).hist );
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−    %% checking system has some inputs and outputs left
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−    if sys(i_sys).Ninputs == 0
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−      error('The ssm object has no inputs, which is not allowed!')
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−    elseif sys(i_sys).Noutputs == 0
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−      error('The ssm object has no outputs, which is not allowed!')
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−    end
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−  end
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−  
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−  if nargout == numel(sys)
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−    for ii = 1:numel(sys)
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−      varargout{ii} = sys(ii);
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−    end
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−  else
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−    varargout{1} = sys;
+
−  end
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−end
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−
+
−
+
−%--------------------------------------------------------------------------
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−% Get Info Object
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−%--------------------------------------------------------------------------
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−function ii = getInfo(varargin)
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−  
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−  if nargin == 1 && strcmpi(varargin{1}, 'None')
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−    sets = {};
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−    pl   = [];
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−  else
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−    sets = {'Default'};
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−    pl   = getDefaultPlist;
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−  end
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−  % Build info object
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−  ii = minfo(mfilename, 'ssm', 'ltpda', utils.const.categories.op, '$Id: removeEmptyBlocks.m,v 1.2 2011/07/29 13:46:09 ferran Exp $', sets, pl);
+
−end
+
−
+
−%--------------------------------------------------------------------------
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−% Get Default Plist
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−%--------------------------------------------------------------------------
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−function pl = getDefaultPlist()
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−  pl = plist();
+
−  
+
−end
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−