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<(ATY+BTYA+QCX+DXTCT+DT(X+XT))

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<(ATYB+BTYA+QDDT0)

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

See Also

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