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- function [i,ty,n]=issytem(x)
- % [I,TY,N]=ISSYSTEM(X) checks whether or not X is a system created by
- % the function MKSYS. If X is a system, then
- % I = 1
- % TY = system type
- % N = number of matrices in the system (depends on TY)
- % Otherwise, I=0, TY=[] and N=0.
-
- i=0;
- ty=[];
- n=0;
- [j,b]=istree(x,'ty');
- sysmagic=27591;
- if j,
- if x(4)==sysmagic,
- i=1;
- ty=b;
- [junk,n]=vrsys(ty);
- end
- end
-
-