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scilab 2.6-4
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abcd - state-space matrices  @abcd
abinv -  AB invariant subspace  @abinv
arhnk - Hankel norm approximant  @arhnk
arl2 - SISO model realization by L2 transfer approximation  @arl2
balreal - balanced realization  @balreal
bilin - general bilinear transform  @bilin
cainv -  Dual of abinv  @cainv
calfrq - frequency response discretization  @calfrq
canon - canonical controllable form  @canon
cls2dls - bilinear transform  @cls2dls
colregul - removing poles and zeros at infinity  @colregul
cont_frm - transfer to controllable state-space  @cont_frm
cont_mat - controllability matrix  @cont_mat
contr - controllability, controllable subspace  @contr
contrss - controllable part  @contrss
csim - simulation (time response) of linear system  @csim
ctr_gram - controllability gramian  @ctr_gram
dbphi - frequency response to phase and magnitude representation  @dbphi
ddp - disturbance decoupling  @ddp
des2tf - descriptor to transfer function conversion  @des2tf
dscr -  discretization of linear system  @dscr
dsimul -  state space discrete time simulation  @dsimul
dt_ility - detectability test  @dt_ility
equil - balancing of pair of symmetric matrices  @equil
equil1 - balancing (nonnegative) pair of matrices  @equil1
feedback - feedback operation  @feedback
flts - time response (discrete time, sampled system)  @flts
frep2tf - transfer function realization from frequency response  @frep2tf
freq - frequency response  @freq
freson - peak frequencies  @freson
g_margin - gain margin  @g_margin
gfrancis - Francis equations for tracking  @gfrancis
imrep2ss - state-space realization of an impulse response  @imrep2ss
invsyslin - system inversion  @invsyslin
kpure - continuous SISO system limit feedback gain  @kpure
krac2 - continuous SISO system limit feedback gain  @krac2
lin - linearization  @lin
lqe - linear quadratic estimator (Kalman Filter)  @lqe
lqg - LQG compensator  @lqg
lqg2stan - LQG to standard problem  @lqg2stan
lqr - LQ compensator (full state)  @lqr
ltitr - discrete time response (state space)  @ltitr
markp2ss - Markov parameters to state-space  @markp2ss
minreal - minimal balanced realization  @minreal
minss - minimal realization  @minss
obs_gram - observability gramian  @obs_gram
obscont - observer based controller  @obscont
observer - observer design  @observer
obsv_mat - observability matrix  @obsv_mat
obsvss - observable part  @obsvss
p_margin - phase margin  @p_margin
pfss - partial fraction decomposition  @pfss
phasemag - phase and magnitude computation  @phasemag
ppol - pole placement  @ppol
projsl - linear system projection  @projsl
repfreq - frequency response  @repfreq
ricc - Riccati equation  @ricc
rowregul - removing poles and zeros at infinity  @rowregul
rtitr - discrete time response (transfer matrix)  @rtitr
sm2des - system matrix to descriptor  @sm2des
sm2ss - system matrix to state-space  @sm2ss
specfact - spectral factor  @specfact
ss2des - (polynomial) state-space to descriptor form  @ss2des
ss2ss - state-space to state-space conversion, feedback, injection  @ss2ss
ss2tf - conversion from state-space to transfer function  @ss2tf
st_ility - stabilizability test  @st_ility
stabil - stabilization  @stabil
svplot - singular-value sigma-plot  @svplot
sysfact- system factorization  @sysfact
syssize - size of state-space system  @syssize
tf2ss - transfer to state-space  @tf2ss
time_id - SISO least square identification  @time_id
trzeros - transmission zeros and normal rank  @trzeros
ui_observer - unknown input observer  @ui_observer
unobs - unobservable subspace  @unobs
zeropen - zero pencil  @zeropen