function abg = make_abg(system)
global mtt_environment
start_time = mttGetTime ;
input = [] ;
abg = [] ;
switch class(system)
case 'char',
input = 'spec' ;
case 'struct',
if isfield(system,'representation')
input = system.representation ;
end
end
if strcmp(input,'spec')
mttWriteNewLine ;
mttNotify('Making "abg" representation') ;
mttWriteNewLine ;
if isempty(mtt_environment)
mttNotify('...WARNING: No "env" definition => all domain references will be ignored') ;
mttWriteNewLine ;
mttNotify(' => paths will not be recognised') ;
mttWriteNewLine ;
end
abg = mttCreateAcausalBondgraph(system) ;
input = 'abg' ;
end
mttAssert(strcmp(input,'abg'),'Input representation not recognised') ;
if isempty(abg)
mttWriteNewLine ;
mttNotify('Copying "abg" representation') ;
mttWriteNewLine ;
mttNotify('...INFO: Input already defined as a "abg": copying to Output') ;
mttWriteNewLine ;
mttWriteNewLine ;
abg = system ;
end
elapsed_time = mttElapseTime(start_time) ;
cpu_utilisation = round(100*elapsed_time.cpu/elapsed_time.clock) ;
mttWriteNewLine ;
mttNotify(['Completed in ',num2str(elapsed_time.clock),' seconds']) ;
mttNotify([' (',num2str(cpu_utilisation),'%% cpu)']) ;
mttWriteNewLine ;
mttWriteNewLine ;