Greek letters in plot legend

[Xin Dong]

Hi all,

I need Greek letters in plot legend. I use the command:

legend("\eta=5", "\eta=10", "\eta=15", "\eta=20", "location", "southwest");

However, octave cannot parse "\eta". The interesting thing is if I use "\alpha" or "\theta", it can be successfully displayed. I tried it on Octave 3.0.1 on Unbuntu 9.04 and Octave 3.2.2 on Mac OS X, both have the same problem.

Can anyone give some advice?

Thanks,
Xin