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Re: st: Re: referring to groups of variables by suffixes


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: referring to groups of variables by suffixes
Date   Wed, 28 Nov 2012 13:09:57 +0000

This is undoubtedly good advice. It is one of the reasons I used (the
equivalent of)

ds *_foo

in my own post. Then you can see what your wildcard has caught.

Nick

On Wed, Nov 28, 2012 at 1:06 PM, Steve Nakoneshny <scnakone@ucalgary.ca> wrote:
> Mike,
>
> All you need is to use the wildcard as a prefix.
>
> drop *_foo
> drop *_bar
>
> This will -drop- all vars with _foo or _bar as terminal. If it so happened that you wanted to drop a var or series of vars with _foo in the middle, you would need to add another wildcard to the end of the -drop- command:
>
> drop *_foo*
>
> Be very careful using this technique as it is indiscriminate and you may end up dropping vars unintentionally because of a shared nomenclature.
>
> Steve
>
> Sent via carrier pigeon
>
> On 2012-11-28, at 5:49 AM, "Michael Stewart" <michaelstewartresearch@gmail.com> wrote:
>
>> Dear Statalist reader,
>>
>> I am working with a large dataset (approx 600 variables) with
>> different names but some of them end in similar manner
>>
>> Eg:
>> procedure__11_procedure_code___i
>> procedure__11_procedure_date
>> procedure__11_procedure_or_ind
>> procedure__11_procedure_tissue_t
>> procedure__11_procedure_type
>> procedure__12_procedure_abnormal
>> procedure__12_procedure_code_icd
>> procedure__12_procedure_date
>> procedure__12_procedure_ep_no
>> procedure__12_procedure_location
>> procedure__12_procedure_or_ind
>> procedure__12_procedure_physicia
>> procedure__12_procedure_tissue_t
>> procedure__12_procedure_type
>> procedure__12_procedure_type0
>> procedure__13_procedure_abnormal
>> procedure__13_procedure_anes_age
>> procedure__13_procedure_anes_met
>> procedure__13_procedure_code_icd
>> procedure__13_procedure_date
>>
>> I want to drop variables ending with procedure_tissue_t and
>> procedure_anes_age. Its tedious to do it for large number of
>> variables.Can you please suggest a shortcut . Is there  a shortcut to
>> refer to all variables ending with procedure_tissue_t &
>> procedure_anes_age.I found shortcuts to refer to variables for
>> prefixes  but not for suffixes so far.
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