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st: AW: How to make ID as 01 instead of 1

From   "Martin Weiss" <>
To   <>
Subject   st: AW: How to make ID as 01 instead of 1
Date   Mon, 14 Dec 2009 13:46:59 +0100


You cannot -replace- the numeric variable because -replace- cannot promote
the data type to -string-. Just create a new variable, then:

gen newx="0"+string(x)

You could also -format- the numeric variable -format x %02.0f- to achieve a
similar effect, without changing the actual contents of the variable...


-----Ursprüngliche Nachricht-----
[] Im Auftrag von Quang Nguyen
Gesendet: Montag, 14. Dezember 2009 13:45
Betreff: st: How to make ID as 01 instead of 1

Dear all:

Can you show me how I can generate ID in the following manner: 01,
02..... instead of 1, 2, 3...?

>From the original data, I have ID in the form of 1, 2, ...... I then
use the following commands:

tostring ID, replace
replace x = "01" if x=="1"

There was a message "type mismatch".

Any help is appreciated.

Sincerely yours,


"My father gave me the greatest gift anyone could give another person,
he believed in me." - Jim Valvano
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