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Re: st: Question About Evaluating Expressions


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Question About Evaluating Expressions
Date   Thu, 18 Apr 2013 15:11:48 +0100

Corrected below.

Nick
njcoxstata@gmail.com


On 18 April 2013 15:09, Nick Cox <njcoxstata@gmail.com> wrote:
> generate bin_number = ""
> local u 10
>
> forvalues i = 900(`u')1500 {
>      local I = `i' + `u'
>     replace bin_number = "`i'-`I'" if  condition > `i' & condition <= `I'
> }
>
> It could be done with one fewer line, the price being a veritable
> snowstorm of quotation marks:
>
> generate bin_number = ""
> local u 10
>
> forvalues i = 900(`u')1500 {
>      replace bin_number = "`i'-`=`i' + `u''" if (condition > `i' &
> condition <= `i' + `u')
> }
>
> Nick
> njcoxstata@gmail.com
>
>
> On 18 April 2013 15:03, Erika Kociolek <ekociole@gmail.com> wrote:
>> I am trying to "bin" some data into categories using the code below. I
>> would like the bin_number variable to look like this:
>>
>> condition     bin_number
>> 905             900-910
>>
>> If I run the code below, using condition = 905 as an example, I get
>> the following:
>> condition     bin_number
>> 905             900-(900+10)
>>
>> How do I get Stata to first evaluate what's in the parentheses and
>> then put the result into the bin_number variable?
>>
>> Code:
>> generate bin_number = ""
>> local u 10
>>
>> forvalues i = 900(`u')1500{
>>      replace bin_number = "`i'" + "-" + "(`i' + `u')" if (condition >
>> `i' & condition <= `i' + `u')
>> }
>>
>> Any advice would be greatly appreciated.
>> Erika
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