Robust Control Toolbox™

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.

Example

Consider the LMI

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

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

See Also
lmivar      Specify the matrix variables in an LMI problem

setmvar     Instantiate a matrix variable and evaluate all LMI terms involving this matrix variable

lmiinfo     Interactively retrieve information about the variables and term content of LMIs

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