[R] how to change the tick character of x-axis ?

[Jie TANG]

Hello,
Now I draw a figure by boxplot ,but I am fail to add the tick information in
the axis? How could I ?

https://mail.google.com/mail/?ui=2&ik=c88089ec0a&view=att&th=1266e2c8dff41fcb&attid=0.1&disp=attd

now  I want to add the tick information in the x-axis as Class1
,Class2,Class3 instead of "X5,X12,V3,V4,V5,V6"
What can I do to achieve my goal?thanks


TANG Jie
Email: totangjie at gmail.com
Tel: 0086-2154896104
Shanghai Typhoon Institute,China
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