www.gusucode.com > rctobsolete 工具箱 matlab源码程序 > rctobsolete/lmi/islsys.m
% bool = islsys(sys) % % Returns 1 if SYS is a SYSTEM matrix % Author: P. Gahinet 6/94 % Copyright 1995-2004 The MathWorks, Inc. function bool = islsys(sys) sys=sys(:); bool=(length(find(sys(2:length(sys))==-Inf))==1);