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1 | function [A,b,lmi_variables] = generateAB(varargin) |
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2 | %GENERATEAB Internal function to generates linear equation system |
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3 | |
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4 | % Author Johan Löfberg |
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5 | % $Id: generateAB.m,v 1.4 2006/07/26 20:17:58 joloef Exp $ |
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6 | |
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7 | if mod(nargin,2)~=0 |
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8 | error('Internal error in generateAB. Please report.'); |
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9 | end |
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10 | |
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11 | lmi_variables = []; |
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12 | n_eq = 0; |
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13 | for r = 1:nargin/2 |
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14 | [n,m] = size(varargin{1+2*(r-1)}); |
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15 | n_eq = n_eq + n*m; |
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16 | lmi_variables = [lmi_variables varargin{1+2*(r-1)}.lmi_variables(:)']; |
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17 | end |
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18 | lmi_variables = uniquestripped(lmi_variables); |
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19 | |
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20 | A = spalloc(n_eq,length(lmi_variables),n_eq); |
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21 | b = spalloc(n_eq,1,n_eq); |
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22 | |
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23 | btop = 1; |
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24 | atop = 1; |
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25 | for r = 1:nargin/2 |
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26 | X = varargin{2*r-1}; |
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27 | [n,m] = size(X); |
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28 | used_variables = find(ismembc(lmi_variables,X.lmi_variables)); |
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29 | A(atop:atop+n*m-1,used_variables) = X.basis(:,2:end); |
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30 | b(btop:btop+n*m-1) =varargin{2*r}(:)-X.basis(:,1); |
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31 | atop = atop+n*m; |
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32 | btop = btop+n*m; |
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33 | end |
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