Following is a brief description of how the 'analyze' function
is used from the command line.  It calls 'isitstable' and, in
turn, 'maxeig' in order to accomplish its task.


» a = [1 4 7;
       0 2 9;
       1 9 -1]

a =

     1     4     7
     0     2     9
     1     9    -1

» text = analyze(a);
» text

text =

The system is unstable