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Re: st: Re: Delete upper case variable


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Delete upper case variable
Date   Mon, 23 Apr 2012 01:38:06 +0100

You are right about your innermost thought on -findname- (SJ, SSC). See

http://www.stata.com/statalist/archive/2012-04/msg00193.html

The -any()- and -all()- options were intended to let users stipulate
conditions about the values of variables, but you can use it as a way
of stipulating conditions about their names.

The condition that upper("<char>") == "<char>" is also satisfied by
the underscore _ which can begin variable names.

Nick

On Sun, Apr 22, 2012 at 10:41 PM, Eric Booth <eric.a.booth@gmail.com> wrote:
> <>
>
> I don't think -findname- has the ability to select on variable case (that I could find anyways ((I thought I remembered Nick Cox commenting about this in an earlier thread, but I couldnt find it - or I'm imagining it))) ).
>
> Here's a one way to do it:
>
> *************!
> sysuse auto, clear
> rename mpg headroom, upper
> **
> foreach a in  `c(ALPHA)' {
> cap ds `a'*
> loc list `"`list' `r(varlist)' "'
> }
> di `"`list'"' //check this
> drop `list'
> *************!
>
> - Eric
>
> _
> Eric A. Booth
> Public Policy Research Institute
> Texas A&M University
> ebooth@ppri.tamu.edu
> +979.845.6754
>
>
> On Apr 22, 2012, at 4:14 PM, Janet Hill wrote:
>
>> I am importing a large dataset and, following various data manipulations, I generate new variables that have lower case names. To clean the dataset I need to delete all variables that start with an upper case letter. I can see the names in ds or findname (from SSC) but I can't work out how to select these names for deletion. I would be grateful for any advice on this. I am using Stata 12.
>>

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