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RE: st: -destring- and missing values


From   "Jeph Herrin" <stata@spandrel.net>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: -destring- and missing values
Date   Wed, 2 Oct 2013 13:33:03 -0400

Sounds like the perfect email client - which is it? 

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Laura Gibbons
Sent: Wednesday, October 02, 2013 12:56 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: -destring- and missing values

Definitely.  In my emailer, the values 1 and 2 have an A circumflex after
them.

On Wed, 2 Oct 2013, Nick Cox wrote:

> I'd check for non-standard characters that can't be printed, e.g.
> using -charlist- (SSC).
>
> I agree with the principle that -destring- should ignore spaces.
> Nick
> njcoxstata@gmail.com
>
>
> On 2 October 2013 17:07, Jeph Herrin <stata@spandrel.net> wrote:
>> All,
>>
>> I have hundreds of variables that look like this:
>>
>> . d q1
>>
>>               storage   display    value
>> variable name   type    format     label      variable label
>> -------------------------------------------------------------
>> q1               str2    %2s
>>
>> . tab q1, m
>>
>>         q1  |      Freq.     Percent        Cum.
>> ------------+-----------------------------------
>>             |          2        0.89        0.89
>>          1  |        216       96.00       96.89
>>          2  |          7        3.11      100.00
>> ------------+-----------------------------------
>>       Total |        225      100.00
>>
>> but when I try to use -destring-
>>
>> . destring q1, replace
>> q1  contains nonnumeric characters; no replace
>>
>> According to the documentation,
>>
>>     destring treats both empty strings "" and "." as indicating 
>> sysmiss (.)...
>>     destring also ignores any leading or trailing spaces so that, for 
>> example,
>>     " " is equivalent to "" and " . " is equivalent to ".".
>>
>> Why is -destring- not converting my variables to numeric? I think I 
>> must be missing something very obvious.
>>
>> I can get around this by
>>
>>  replace q1 = "." if mi(q1)
>>
>> but I don't think I should have to.
>>
>>
>> J
>>
>>
>>
>>
>>
>> *
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>

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Laura E. Gibbons, PhD
General Internal Medicine, University of Washington Box 359780, Harborview
Medical Center, 325 Ninth Ave, Seattle, WA 98104
phone: 206-744-1842, fax: 206-744-9917,
Office address: 401 Broadway, Suite 5122.6
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
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*   http://www.ats.ucla.edu/stat/stata/

*
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