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Re: st: RE: numlabel gives syntax error on one specific dataset


From   Austin Nichols <austinnichols@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: numlabel gives syntax error on one specific dataset
Date   Wed, 23 Feb 2011 12:15:11 -0500

Nick--
Is that -hexdump- output reporting on the contents of labels?  It is
easy to break -numlabel- with some odd characters in labels:

sysuse auto, clear
la def r 1 "poor" 2 "`=char(96)'fair" 3 "OK" 4 "good" 5 "superb"
la val rep78 r
ta rep78
numlabel, add force
ta rep78

But one can strip out all the weird characters from all the labels...

foreach var of var _all {
 loc la: val lab `var'
 if "`la'"!="" {
 qui levelsof `var', loc(ls)
 foreach l of loc ls {
loc v: label `la' `l'
loc g=subinstr("`v'",char(96),"",.)
forv h=123/255 {
 loc g=subinstr("`g'",char(`h'),"",.)
 }
la def `la' `l' "`g'", modify
  }
 }
}


On Wed, Feb 23, 2011 at 10:03 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> I said that Graham could send a copy to me. I confirm that I get his error message with his data. Looking at the labels there are some unprintable characters in his labels. So, I think he's right. It's a problem with his data.
>
> The error message, by the way, emanates from inside -matalabel-, but tracing it didn't seem the major part of valour.
>
> ASCII-fluent experts can perhaps ascertain [good word, isn't it] what may be alien from the results of -hexdump, tabulate-.
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