delmvar

Remove one matrix variable from LMI problem

Syntax

newsys = delmvar(lmisys,X)

Description

delmvar removes the matrix variable X with identifier X from the list of variables defined in lmisys. The identifier X should be the second argument returned by lmivar when declaring X. All terms involving X are automatically removed from the list of LMI terms. The description of the resulting system of LMIs is returned in newsys.

Examples

Consider the LMI

$0 < (\begin{matrix} A^{T} Y + B^{T} Y A + Q & C X + D \\ X^{T} C^{T} + D^{T} & - (X + X^{T}) \end{matrix})$

involving two variables X and Y with identifiers X and Y. To delete the variable X, type

lmisys = delmvar(lmisys,X)

Now lmisys describes the LMI

$0 < (\begin{matrix} A^{T} Y B + B^{T} Y A + Q & D \\ D^{T} & 0 \end{matrix})$

with only one variable Y. Note that Y is still identified by the label Y.

Version History

Introduced before R2006a

delmvar

Syntax

Description

Examples

Version History

See Also