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st: Why does Stata do it wrong?


From   Tesfayi Gebre <[email protected]>
To   [email protected]
Subject   st: Why does Stata do it wrong?
Date   Mon, 9 Jun 2003 05:45:35 -0700 (PDT)

Dear Statlister,

I want to generate a single unique id to merge files
by using variables: var1 (F1) var2 (F3) var3 (F4) and
var4 (F2), where F shows the integer width (f format).
So, I used 

gen id = var1*10^9 + var2*10^6 + var3*10^2 + var4

This is the output from stata and the true id (as it
should be) for the following
example:

var1   var2   var3  var4   id (stata)   id (true)
1      2      3452   1     1005452032	1002345201
1      121    34     10	   1121033984	1121003410
2      23     156    2     2023155968	2023015602
2      45     3      2     2045003008	2045000302
3      6      4      3     3006003968	3006000403
3      70     8      5     3070008064	3070000805

Why is the stata id different from the true id? Does
stata store numbers in different format?

Thank you!

Tesfayi

 


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