[R] how to get the studentized residuals in lm()

[zhijie zhang]

Dear friends,
 In s-plus, lm()  generates the the studentized residuals
automatically for us, and In R, it seems don't have the results: After
i fitted lm(), i use attibutes() to see the objects and didn't find
studentized residuals .
 How to get the the studentized residuals in lm(),have i missed something?
thanks very much!

-- 
Kind Regards,
Zhi Jie,Zhang ,PHD
Department of Epidemiology
School of Public Health
Fudan University
Tel:86-21-54237149