Re: st: dropvars.ado

[Nick Cox <njcoxstata@gmail.com>]

Correct about the quotation mark. (I introduced the typo when I
changed the error message after testing it, not the best idea.)

On Tue, Jan 15, 2013 at 10:25 PM, Dimitriy V. Masterov
<dvmaster@gmail.com> wrote:
> Both of the above suggestions work very nicely. Dr. Cox's warning
> message seems to have an an errant apostrophe (unless that's the
> infamous Durham apostrophe).
>
> Many thanks!
>
> DVM
>
> On Tue, Jan 15, 2013 at 2:10 PM, Nick Cox <njcoxstata@gmail.com> wrote:
>> The text at REPEC says, modulo a typo,
>>
>> "dropvars varlist is similar to drop varlist, but warns if a variable
>> does not exist, rather than aborts."
>>
>> However, if any of the names is not that of an existing variable, it
>> is difficult to see how the program Austin gives can get past first
>> base, as -syntax- will throw it out before the -for- loop is entered.
>>
>> Also, unless Dimitriy is using Stata 6, there is no reason not to use
>> -foreach-. (Historians of Stata will join in an unaffectionate
>> rememembrance of the old -for- command.)
>>
>> This is offered up to criticism:
>>
>> program anotherdropvars
>>      version 7
>>      foreach v of local 0 {
>>              capture drop `v'
>>              if _rc {
>>                   noi di as txt "`did you really mean `v'?"
>>              }
>>     }
>> end
>>
>> Nick
>>
>> On Tue, Jan 15, 2013 at 9:49 PM, Austin Nichols <austinnichols@gmail.com> wrote:
>>> Dimitriy V. Masterov <dvmaster@gmail.com>:
>>> The abstract at http://ideas.repec.org/c/boc/bocode/sjw4.html implies
>>> the command does:
>>>
>>> version 6:for var `varlist': capture drop X
>>>
>>> so try
>>>
>>> prog dropvars2
>>> syntax [varlist]
>>> version 6
>>> for var `varlist': capture drop X
>>> end
>>>
>>>
>>> On Tue, Jan 15, 2013 at 4:36 PM, Dimitriy V. Masterov
>>> <dvmaster@gmail.com> wrote:
>>>> Rich,
>>>>
>>>> Unfortunately, I think dropvars.do != dropvars.ado. Dropvars is an
>>>> piece-wise version -capture drop varlist-. The ado file linked from
>>>> http://ideas.repec.org/c/boc/bocode/sjw4.html no longer exists.
>>>>
>>>> DVM
>>>>
>>>> On Tue, Jan 15, 2013 at 1:20 PM, Richard Goldstein
>>>> <richgold@ix.netcom.com> wrote:
>>>>> use the -findit- command (e.g., -findit dropvars-)
>>>>>
>>>>> Rich
>>>>>
>>>>> On 1/15/13 4:00 PM, Dimitriy V. Masterov wrote:
>>>>>> Does anyone know where one can find the code for Jeroen Weesie's dropvars?
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