37 lines
861 B
Matlab
Executable File
37 lines
861 B
Matlab
Executable File
function Y=sdpvarfun(varargin)
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%SDPVARFUN Applies operator on matrix variable
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%
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% Y = sdpvarfun('op',X) Applies the Matlab operator 'op' on X
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%
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% Example : Y = sdpvarfun('triu',X) Extracts upper triangluar part
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op = varargin{1};
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if ~isa(op,'char')
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error('First argument must be a string with the function name')
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end
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X = varargin{2};
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Y = X;
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x_lmi_variables = X.lmi_variables;
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lmi_variables = [];
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Y.basis = [];
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opX = feval(op,reshape(X.basis(:,1),X.dim(1),X.dim(2)));
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Y.basis = opX(:);
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j = 1;
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for i = 1:length(x_lmi_variables)
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opX = feval(op,reshape(X.basis(:,i+1),X.dim(1),X.dim(2)));
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if (norm(opX,inf)>0)
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Y.basis(:,j+1) = opX(:);
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lmi_variables = [lmi_variables x_lmi_variables(i)];
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j = j+1;
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end
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end
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Y.dim(1) = size(opX,1);
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Y.dim(2) = size(opX,2);
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Y.lmi_variables = lmi_variables;
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% Reset info about conic terms
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Y.conicinfo = [0 0];
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