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RE: st: RE: eliminating the nth digit of a numeric variable


From   "Sayer, Bryan" <BSayer@s-3.com>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: RE: eliminating the nth digit of a numeric variable
Date   Thu, 27 Feb 2003 13:07:04 -0500

Given the specific problem at hand, it seems to me that replacing the LAST
zero could be pretty hazardous.  One would need to do a frequency of the
last digit, the second to last digit, and the third to last digit to be
POSITIVE that there is not a zero in a location that should stay there.
This is probably a good idea in any case.

But since the specific problem is to drop the zero that is in the third to
last position, a solution that does only that seems preferable.

Bryan Sayer
Statistician, SSS Inc.
bsayer@s-3.com

-----Original Message-----
From: Bill Rising [mailto:brising@louisville.edu]
Sent: Thursday, February 27, 2003 12:39 PM
To: Stata Listserve
Subject: RE: st: RE: eliminating the nth digit of a numeric variable


On 2/27/03 11:39, Nick Cox wrote

>Bill Rising
>
>> Nick also gave a solution for replacing all 0's:
>> 
>> >
>> >	real(subinstr(string(myvar),"0","",1)) 
>> >
>> 
>
>This replaces the _first_ zero found. 
>
>> If it were known that the last zero were the evil zero, 
>> this could be 
>> done via:
>> 
>> real(reverse(subinstr(reverse(string(myvar,%30.0g)),"0","",1)))
>> 
>> (at least if the number is smaller than Stata's longs)
>> 
>

Oops. Wasn't reading too close.

Bill (redfaced)
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