矩阵计算

可控性和可观测性，李雅普诺夫方程和黎卡提方程

函数

`lyap`	连续李雅普诺夫方程解
`lyapchol`	Square-root solver for continuous-time Lyapunov equation
`dlyap`	求解离散时间李雅普诺夫方程
`dlyapchol`	Square-root solver for discrete-time Lyapunov equations
`icare`	Implicit solver for continuous-time algebraic Riccati equations
`idare`	Implicit solver for discrete-time algebraic Riccati equations
`care`	(Not recommended) Continuous-time algebraic Riccati equation solution
`dare`	(Not recommended) Solve discrete-time algebraic Riccati equations (DAREs)
`gcare`	(Not recommended) Generalized solver for continuous-time algebraic Riccati equation
`gdare`	(Not recommended) Generalized solver for discrete-time algebraic Riccati equation
`ctrb`	Controllability of state-space model
`obsv`	Observability of state-space model
`ctrbf`	Compute controllability staircase form
`obsvf`	Compute observability staircase form
`gram`	Controllability and observability Gramians
`gramOptions`	Options for the `gram` command
`bdschur`	Block-diagonal Schur factorization
`norm`	Norm of linear model