34 lines
800 B
Matlab
Executable File
34 lines
800 B
Matlab
Executable File
function Y = imag2real(Y)
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%IMAG2REAL
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if isreal(Y)
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y = Y;
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return
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end
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realBase = real(Y.basis);
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imagBase = imag(Y.basis);
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lmi_variables = getvariables(Y);
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nv = length(lmi_variables);
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% [re im;-im re] = kron(I,re) + kron([0 1;-1 0],im)
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sparse_X1 = [1 0;0 1];
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sparse_X2 = [0 1;-1 0];
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temp = kron(sparse_X1,reshape(realBase(:,1),Y.dim(1),Y.dim(1)))+ kron(sparse_X2,reshape(imagBase(:,1),Y.dim(1),Y.dim(1)));
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temp = temp(:);
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Y.basis = temp(:);
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for i = 1:nv
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temp1 = kron(sparse_X1,reshape(realBase(:,i+1),Y.dim(1),Y.dim(1)));
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temp2 = kron(sparse_X2,reshape(imagBase(:,i+1),Y.dim(1),Y.dim(1)));
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Y.basis(:,i+1) = temp1(:) + temp2(:);
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end;
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Y.dim(1) = size(temp1,1);
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Y.dim(2) = size(temp1,2);
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Y = clean(Y);
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% Reset info about conic terms
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if isa(Y,'sdpvar')
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Y.conicinfo = [0 0];
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end |