[R] How to change the label in plot.ts ?

Tong Wang
2006-03-17T07:46:19Z

Hi you guys:
      I have been wondering if there is any way to change the labeling in
plot.ts( ),  for example , if I plot two sequences,
i always got y labels as "series1", "series2", I tried to
use ylab=c((expression(mu_1)),(expression(mu_2))), but it
doesn't work.
      thanks in advance for any help

best.