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Re: st: For Loop Using Variable Labels


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: For Loop Using Variable Labels
Date   Mon, 24 Jun 2013 23:49:31 +0100

You say

"I'd like to use
the "levelsof" command on the variable label instead of the variable
values, since the label for the lowest category will always be in the
dataset, but there may not be a variable value for each response
category"

When you say _variable label_ do you mean _value label_ ? .
Nick
njcoxstata@gmail.com


On 24 June 2013 23:40, Erika Kociolek <ekociole@gmail.com> wrote:
> Let's say I wanted to write to a file the number of responses to a
> variety of survey questions with different categories. I'll use the
> voter dataset to illustrate what I want to do.
>
> **********************
> *Stata Code*
>
> cd C:/PATH/Data/
> sysuse voter, clear
> keep candidat-inc
> drop if inc == 1  /*Drop if inc variable is equal to 1 (< $15k)*/
>
> file open mefile using ../Data/Test.txt, write replace
> file write mefile "Variable" _tab "Value" _tab "Number" _tab "Total" _tab _n
>
> foreach v of varlist candidat-inc{ /*For each variable in the dataset:*/
>    levelsof `v', local(temp) /*Store variable values in a local macros.*/
>
>    foreach t of local temp{ /*For each value of the variable:*/
>       file write mefile "`v'" _tab /*Write variable name to file,*/
>       file write mefile "`t'" _tab /*Write question response to file,*/
>       summarize `v' if `v' == `t'
>       file write mefile "`r(N)'" _tab /*Write value to file,*/
>    }
>    summarize `v'
>    file write mefile "`r(N)'" _tab _n /*Write total number of
> responses to the question (variable) to file.*/
> }
>
> file close mefile
> **********************
>
> So I dropped the lowest income category from the dataset (let's assume
> there were no responses in that particular category). I'd like to use
> the "levelsof" command on the variable label instead of the variable
> values, since the label for the lowest category will always be in the
> dataset, but there may not be a variable value for each response
> category. How would one do that?
>
> Thanks!
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