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Re: st: Question About Evaluating Expressions


From   Erika Kociolek <ekociole@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Question About Evaluating Expressions
Date   Thu, 18 Apr 2013 07:24:07 -0700

This is great - thank you!

Erika

On Thu, Apr 18, 2013 at 7:11 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> 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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