function [bonds,status] = GY_cause(bonds);
% GY_cause - causality for GY component
% 
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%     %%%%% Model Transformation Tools %%%%%
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% 
% Matlab function  GY_cause
% [bonds,status] = GY_cause(bonds);

%SUMMARY GY: elementary gyrator component
%DESCRIPTION Energy conserving two-port
%DESCRIPTION e_1 = f(f_2); f_1 = f(e_2)



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% %% Version control history
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% %% $Id$
% %% $Log$
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% Copyright (c) P.J. Gawthrop, 1996.

%Causality of GY is same as that of a TF but with flipped effort/flow
bonds(2,:) = - bonds(2,:);
[bonds,status] = TF_cause(bonds);
bonds(2,:) = - bonds(2,:);