function structure = R_eqn(name,bond_number,bonds,direction,cr,args, ...
structure,eqnfile);
% R_eqn - Equation function for a (multi-port) unicausal R component
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%% Model Transformation Tools %%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Matlab function R_eqn
% structure = R_eqn(name,bond_number,bonds,direction,cr,args, ...
% structure,eqnfile)
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Copyright (c) P.J. Gawthrop, 1996.
if nargin<8
eqnfile = 'stdout';
end;
% Find the number of ports
[ports,junk] = size(bonds);
for outport = 1:ports
outcause = -bonds(outport,1);
outnumber = bond_number(outport);
fprintf(eqnfile, '%s\t:= ', varname(name,outnumber, outcause));
incause = bonds(:,1);
eqn = equation(name,cr,args,outnumber,outcause,outport, ...
bond_number,incause,1:ports);
fprintf(eqnfile, '%s',eqn);
end;