Rev | Line | |
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[37] | 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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