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RE: st: another data cleaning question


From   Finne Håkon <Hakon.Finne@sintef.no>
To   statalist@hsphsun2.harvard.edu
Subject   RE: st: another data cleaning question
Date   Mon, 24 Jun 2002 10:51:20 +0200

Several possibilities. The easiest one now (provided there are no more
surprises) is to add one line of code after gen cropcod2=int(varcode/100):
	replace cropcod2=int(varcode/1000) if inrange(varcode,100000,.)
-inrange- is listed under special functions; see -help functions- .
The following code will yield the same result:
	replace cropcod2=int(varcode/1000) if varcode>99999 & varcode<.

Håkon

Håkon Finne
http://www.sintef.no

> -----Original Message-----
> From: Babigumira Ronnie [mailto:rutaremwa_rb@yahoo.com]
> Sent: 24. juni 2002 10:29
> To: statalist@hsphsun2.harvard.edu
> Subject: Re: st: another data cleaning question
> 
> 
> --- Roger Newson <roger.newson@kcl.ac.uk> wrote:
> > Use the -int- function (see -help functions-). In this 
> case, you might
> > type
> > 
> > gene cropcod2=int(varcode/100)
> > list if cropcod2!=cropcode
> > assert cropcod2==cropcode
> > drop cropcod2
> > 
> > and Stata will generate a new variable -cropcod2-, which 
> should be equal
> > to -cropcode- if the data are consistent. Stata will then list
> consistent
> > cases, and halt execution if there are any inconsistent 
> cases, and drop
> > the variable -cropcod2- otherwise.
> > 
> > I hope this helps.
> > 
> Hi Roger,
> Many thanks. It works however, I have a slight complication, 
> some of the
> variety codes are more than 5. Here is an example (also 
> included is the
> new variable cropcod2)
> 
>         villcode  cropcode   cropcod2       varcode
> 1.      1531002       110        110         11001
> 2.      1531002       110        110         11001
> 377.    1360100       110       1101        110104
> 378.    1362000       110       1101        110104
> 
> The first 2 varcodes have 5 digits and hence 
> 
> . gen cropcod2=int(varcode/100) 
> 
> would work just fine, however, the last two have varcodes 
> with 6 digits
> which would therefore mean that I would need to rewrite the syntax to 
> 
> . gen cropcod2=int(varcode/1000)
> 
> This would however truncate that 5 digit varcodes and the resulting
> cropcod2 would have 2 digits.
> 
> I would therefore like to put in a condition that would allow 
> the first
> truncation to be done only if the number of digits in varcode is 5 and
> then replace cropcod2 with a new truncated figure if the varcode has 6
> digits. I have searched the manual and I still haven't found 
> it. Might you
> (or anyone else reading) have any idea how I can do this.
> 
> Roni
> 
> 
> 
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