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st: RE: How to lengthen a number


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: How to lengthen a number
Date   Wed, 10 Feb 2010 18:48:14 -0000

My guess is that you are confusing two separate things, how a number is
held in storage and how it is presented. 

If you want display that includes a leading zero to pad 5 displayed
digits to 6, then check out display formats, say 

. format x %06.0f 

If you want identifiers that always include 0s as part of what is held,
then that requires a string version, and what you did sounds correct of
one way of doing it. See also below. 

. set obs 5
obs was 0, now 5

. gen foo = cond(_n == 5, 99999, 999999)

. gen bar = string(foo, "%06.0f")

. l

     +-----------------+
     |    foo      bar |
     |-----------------|
  1. | 999999   999999 |
  2. | 999999   999999 |
  3. | 999999   999999 |
  4. | 999999   999999 |
  5. |  99999   099999 |
     +-----------------+

 

Nick 
n.j.cox@durham.ac.uk 


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nathan Hutto
Sent: 10 February 2010 18:37
To: statalist@hsphsun2.harvard.edu
Subject: st: How to lengthen a number

Hi all,

I have a numeric variable "x". Some of the values are 5 digits and
others are 6 digits. I would like all of the values to be 6 digits, so
I would like to add a zero to the beginning of the 5 digit values. I
converted "x" to a string variable, created another string
variable=="0" and added them together, but that didn't work. Anyone
know how I can do this?

thank you,
Nathan
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