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[37] | 1 | function y = kron(X,Y) |
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| 2 | %KRON (overloaded) |
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| 3 | |
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| 4 | % Author Johan Löfberg |
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| 5 | % $Id: kron.m,v 1.1 2006/08/10 18:00:21 joloef Exp $ |
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| 6 | |
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| 7 | if isequal(X,1) |
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| 8 | y = Y; |
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| 9 | return; |
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| 10 | end |
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| 11 | |
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| 12 | if isequal(Y,1); |
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| 13 | y = X; |
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| 14 | end |
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| 15 | |
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| 16 | if (isa(X,'sdpvar') & isa(Y,'sdpvar')) |
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| 17 | y = []; |
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| 18 | for i = 1:size(X,1) |
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| 19 | this_row = []; |
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| 20 | s.type = '()'; |
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| 21 | for j = 1:size(X,2); |
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| 22 | s.subs = {i,j}; |
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| 23 | this_row = [this_row subsref(X,s)*Y]; |
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| 24 | end |
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| 25 | y = [y;this_row]; |
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| 26 | end |
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| 27 | return |
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| 28 | end |
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| 29 | |
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| 30 | if isa(X,'sdpvar') |
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| 31 | lmi_variables = getvariables(X); |
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| 32 | nv = length(lmi_variables); |
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| 33 | y = X; |
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| 34 | sparse_Y = sparse(Y); |
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| 35 | temp = kron(getbasematrix(X,0),sparse_Y); |
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| 36 | y.basis=temp(:); |
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| 37 | for i = 1:nv |
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| 38 | temp = kron(getbasematrix(X,lmi_variables(i)),sparse_Y); |
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| 39 | y.basis(:,i+1) = temp(:); |
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| 40 | end; |
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| 41 | end |
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| 42 | |
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| 43 | if isa(Y,'sdpvar') |
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| 44 | lmi_variables = getvariables(Y); |
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| 45 | nv = length(lmi_variables); |
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| 46 | y = Y; |
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| 47 | sparse_X = sparse(X); |
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| 48 | temp = kron(sparse_X,getbasematrix(Y,0)); |
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| 49 | y.basis = temp(:); |
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| 50 | for i = 1:nv |
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| 51 | temp = kron(sparse_X,getbasematrix(Y,lmi_variables(i))); |
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| 52 | y.basis(:,i+1) = temp(:); |
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| 53 | end; |
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| 54 | end |
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| 55 | y.dim(1) = size(temp,1); |
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| 56 | y.dim(2) = size(temp,2); |
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| 57 | y = clean(y); |
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| 58 | % Reset info about conic terms |
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| 59 | y.conicinfo = [0 0]; |
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