ss2des(1)

NAME
ss2des - (polynomial) state-space to descriptor form

CALLING SEQUENCE
[S]=ss2des(Sl)

PARAMETERS

Sl  : syslin list: proper or improper linear system.

S   : list

DESCRIPTION
Given the linear system in state-space representation Sl (syslin list), with a D matrix which is either polynomial or constant, but not zero ss2des returns a descriptor system as list('d',A,B,C,0,E) such that:
Sl=C*(s*E-A)^(-1)*B
Note that the (constant) "D matrix" of the descriptor system is zero but Sl cannot be strictly proper.

SEE ALSO
pol2des, tf2des, des2ss

AUTHOR
F. D.