observability MATHSCRIPT PROBLEM

[asdfdsa]

hey,
i am facing a problem in the observability mathscript .  following is the command i am using for findong OBSERVABILITY of 4 matrices A,B,C,D which i have already defined.

Ob=obsv(A,C)'

rank(Ob)

RO=rank(Ob)

CO=CTRB(A,B)

rank(CO)

RC=rank(CO)

It cannot identify the 'obsc' and 'CTRB' commands. Please help.

[smercurio_fc]

An offshoot of this: http://forums.ni.com/t5/LabVIEW/Matlab-problem-in-Labview/m-p/1484990

Those functions are part of the Control Design Toolkit. Do you have this?