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1 | function y = mrdivide(X,Y) |
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2 | %MRDIVIDE (overloaded) |
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3 | |
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4 | % Author Johan Löfberg |
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5 | % $Id: mrdivide.m,v 1.1 2006/08/10 18:00:21 joloef Exp $ |
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6 | |
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7 | if (isa(Y,'sdpvar')) |
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8 | if Y.dim(1)*Y.dim(2) == 1 |
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9 | y = X*Y^-1; |
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10 | return |
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11 | else |
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12 | error('Division of matrix variables not possible (maybe you meant ./).') |
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13 | end |
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14 | end |
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15 | |
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16 | try |
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17 | |
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18 | % Quick exit on scalar division |
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19 | if X.dim(1)*X.dim(2) == 1 & length(Y)==1 |
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20 | if isinf(Y) |
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21 | y = 0; |
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22 | else |
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23 | y = X; |
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24 | y.basis = y.basis/Y; |
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25 | end |
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26 | return |
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27 | end |
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28 | |
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29 | lmi_variables = getvariables(X); |
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30 | nv = length(lmi_variables); |
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31 | y = X; |
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32 | n = X.dim(1); |
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33 | m = X.dim(2); |
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34 | if (n==1) & (m==1) % SPECIAL CODE FOR FREAKY MATLAB BUG |
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35 | y.basis = sparse(reshape(reshape(full(X.basis(:,1)),n,m)/Y,n*m,1)); |
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36 | for i = 1:nv |
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37 | temp = reshape(full(X.basis(:,i+1)),n,m)/Y; |
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38 | y.basis(:,i+1) = sparse(temp(:)); |
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39 | end; |
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40 | else |
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41 | y.basis = reshape(reshape(X.basis(:,1),n,m)/Y,n*m,1); |
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42 | for i = 1:nv |
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43 | temp = reshape(X.basis(:,i+1),n,m)/Y; |
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44 | y.basis(:,i+1) = temp(:); |
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45 | end; |
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46 | end |
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47 | |
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48 | y.dim(1) = size(temp,1); |
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49 | y.dim(2) = size(temp,2); |
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50 | catch |
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51 | error(lasterr); |
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52 | end |
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53 | |
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