User`s guide

esort
11-68
11esort
Purpose Sort continuous-time poles by real part
Syntax s = esort(p)
[s,ndx] = esort(p)
Description esort sorts the continuous-time poles contained in the vector p by real part .
Unstable eigenvalues appear first and the remaining poles are ordered by
decreasing real parts.
When called with one left-hand argument,
s = esort(p) returns the sorted
eigenvalues in
s.
[s,ndx] = esort(p) returnsthea d ditional argumentndx, avectorcontaining
the indices used in the sort.
Example Sort the following continuous eigenvalues.
p
p =
–0.2410+ 0.5573i
–0.2410– 0.5573i
0.1503
–0.0972
–0.2590
esort(p)
ans =
0.1503
–0.0972
–0.2410+ 0.5573i
–0.2410– 0.5573i
–0.2590
Limitations The eigenvalues in the vector p must appear in complex conjugate pairs.