st: Looping to rename

[Zhangqunzi <zhangqunzi@googlemail.com>]

Dear all,

I want to rename my var list: p1,p3,p7..,
Into new one :p1,p2,p3... 

Currently I am running such loop:
Local i 
For var of varlist
Rename var pi

But stata tells me error: can't find macro i ... How should I solve this problem?

I can't use renvars due to memory problem. 
Thanks in advance



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