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Re: st: Replace string values


From   "Joseph Coveney" <jcoveney@bigplanet.com>
To   "Statalist" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Replace string values
Date   Wed, 12 Mar 2008 23:10:26 +0900

Ronnie Babigumira wrote:

I am trying to produce a report using Stata's -list- command. The data looks
like this

        table   quarter     n
    qtr_a.dta         1   128
    qtr_a.dta         2   129
    qtr_a.dta         3   128
    qtr_a.dta         4     4
    qtr_b.dta         1   130
    qtr_b.dta         2   129
    qtr_b.dta         3   130
    qtr_b.dta         4     5

However, to make it easier on the readers eye (I think), I would list it
like this

        table   quarter     n
    qtr_a.dta         1   128
                      2   129
                      3   128
                      4     4
    qtr_b.dta         1   130
                      2   129
                      3   130
                      4     5

Any ideas how I can replace the non-first cases of each table with missing

So far, I was trying to go down this path

bysort  table  quarter: replace  table = "" if table ! =  table[1]

--------------------------------------------------------------------------------

You were almost there.

Joseph Coveney

. clear *

. set more off

. input str20          table   byte quarter    int n

                   table   quarter         n
 1.      qtr_a.dta         1   128
 2.      qtr_a.dta         2   129
 3.      qtr_a.dta         3   128
 4.      qtr_a.dta         4     4
 5.      qtr_b.dta         1   130
 6.      qtr_b.dta         2   129
 7.      qtr_b.dta         3   130
 8.      qtr_b.dta         4     5
 9. end

. bysort table (quarter): replace table = "" if _n > 1
(6 real changes made)

. list, noobs sep(0)

 +---------------------------+
 |     table   quarter     n |
 |---------------------------|
 | qtr_a.dta         1   128 |
 |                   2   129 |
 |                   3   128 |
 |                   4     4 |
 | qtr_b.dta         1   130 |
 |                   2   129 |
 |                   3   130 |
 |                   4     5 |
 +---------------------------+

. exit

end of do-file



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