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

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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>
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1 % blockMatPRUNE selects lines and columns of a block defined matrices stored in a cell array
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2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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3 %
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4 % DESCRIPTION: cell_select selects lines and columns of a block defined
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5 % matrices stored in a cell array
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6 %
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7 % CALL: [cell2] = ssm.cell_array_prune(cell1,rowindex,colindex)
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8 %
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9 % INPUTS:
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10 % cell1 - block defined matrix in cell array
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11 % rowsizes - vector giving block height
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12 % colsizes - vector giving block width
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13 %
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14 % OUTPUTS:
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15 % cell2 - cell array of matrices representing a matrix by blocs.
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16 % blocs may be empty
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17 %
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18 % NOTE : function is private to the ssm class
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19 %
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20 % VERSION: '$Id: blockMatPrune.m,v 1.6 2011/04/08 08:56:22 hewitson Exp $'
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21 %
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22 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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23
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24 function varargout = blockMatPrune(varargin)
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25
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26 cell_in = varargin{1};
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27 rowindex = varargin{2};
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28 colindex = varargin{3};
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29 Nrows = numel(rowindex);
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30 Ncols = numel(colindex);
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31
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32 %% selecting content
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33 cell_out = cell(Nrows, Ncols);
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34 for ii=1:Nrows
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35 for jj=1:Ncols
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36 if ~isequal(cell_in{ii,jj}, []) || min(ii, Ncols)==min(jj, Nrows)
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37 % if we have a non-empty cell or we are on the extended diagonal
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38 cell_out{ii,jj} = cell_in{ii,jj}(rowindex{ii},colindex{jj});
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39 end
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40 end
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41 end
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42
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43 varargout = {cell_out};
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44 end