function eqn = equation(name,cr,args,outbond,outcause,outport, ...
inbonds,incauses,inports)
% eqn is a string containing the equation
%
%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %%%%% Model Transformation Tools %%%%%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Matlab function equations.m
% eqn = equation(name,cr,args,outbond,outcause,outport, ...
% inbonds,incauses,inports)
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.5 1996/12/05 11:26:51 peterg
% %% Null strings now detected with strcmp not length.
% %%
% %% Revision 1.4 1996/09/12 16:42:01 peter
% %% Default now out side this function - need to be none for each
% %% component.
% %%
% %% Revision 1.3 1996/09/12 12:03:58 peter
% %% Added some error checking.
% %% If no constitutive relationship, only add diagonal elementts to
% %% default unity output.
% %%
% %% Revision 1.2 1996/09/10 11:29:47 peter
% %% Removed causality & port info when no constitutive relationship.
% %%
% %% Revision 1.1 1996/09/10 11:11:11 peter
% %% Initial revision
% %%
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
inbonds
incauses
% Find the number of inports
nports = length(inbonds)
% Check some arguments
if length(incauses) ~= nports
error('equation.m: incauses inconsistent with inbonds');
end;
if length(inports) ~= nports
error('equation.m: inports inconsistent with inbonds');
end;
% Set up LHS
LHS = varname(name, outbond, outcause);
% Set up various strings to get correct syntax if some strings are empty
if strcmp(cr,'')
cause_name = '';
port_name = '';
lp = '';
rp = '';
c_comma = '';
else
cause_name = cause2name(outcause);
port_name = sprintf('%1.0f', outport');
lp = '(';
rp = ')';
c_comma = ',';
end
if strcmp(args,'')
a_comma = '';
else
a_comma = ',';
end;
% Set up first line of RHS
RHS1 = sprintf('%s%s%s%s%s%s%s%s\n', ...
cr, lp, args, a_comma, cause_name, c_comma, port_name, c_comma);
% Set up rest of RHS - the input variables, causality and ports.
RHS2 = '';
for i=1:nports
RHS2 = sprintf('%s\t%s', ...
RHS2, varname(name, inbonds(i), incauses(i)));
if strcmp(cr,'')==0 % add the causality & port info
RHS2 = sprintf('%s,%s,%1.0f', ...
RHS2, cause2name(incauses(i)), inports(i));
end;
if (i<nports) % Add a comma
RHS2 = sprintf('%s,\n',RHS2);
else
RHS2 = sprintf('%s\n',RHS2);
end;
end;
% Set up equation
eqn = sprintf('%s := %s%s\t%s;\n', LHS, RHS1, RHS2, rp);