Specify or display systems of LMIs as MATLAB expressions
lmiedit is a graphical user interface for the symbolic specification of LMI problems. Typing
lmiedit calls up a window with two editable text areas and various buttons. To specify an LMI system,
Give it a name (top of the window).
Declare each matrix variable (name and structure) in the upper half of the window. The structure is characterized by its type (
Sfor symmetric block diagonal,
Rfor unstructured, and
Gfor other structures) and by an additional structure matrix similar to the second input argument of
lmivar. Please use one line per matrix variable in the text editing areas.
Specify the LMIs as MATLAB® expressions in the lower half of the window. An LMI can stretch over several lines. However, do not specify more than one LMI per line.
Once the LMI system is fully specified, you can perform the following operations by pressing the corresponding button:
Conversely, display the symbolic expression of the LMI system produced by a particular sequence of
lmitermcommands (click the
Save the symbolic description of the LMI system (
savebutton). This description can be reloaded later on by pressing the
Read a sequence of
lmitermcommands from a file (
readbutton). The matrix expression of the LMI system specified by these commands is then displayed by clicking on
describe the LMIs...
Write in a file the sequence of
lmitermcommands needed to specify a particular LMI system (
Generate the internal representation of the LMI system by pressing
create. The result is written in a MATLAB variable with the same name as the LMI system
Editable text areas have built-in scrolling capabilities. To activate the scroll mode, click in the text area, maintain the mouse button down, and move the mouse up or down. The scroll mode is only active when all visible lines have been used.