inner-outer factorization
[Inn,X,Gbar]=colinout(G)
:G linear system ( syslin list) [A,B,C,D] : :Inn inner factor ( syslin list) : :Gbar outer factor ( syslin list) : :X row-compressor of G ( syslin list) :
Inner-outer factorization (and column compression) of (lxp) G =[A,B,C,D] with l<=p.
G is assumed to be fat ( l<=p) without zero on the imaginary axis and with a D matrix which is full row rank.
G must also be stable for having Gbar stable.
Dual of rowinout.