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Re: st: loop with global marco


From   Nick Cox <njcoxstata@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: loop with global marco
Date   Wed, 19 Feb 2014 13:17:42 +0000

I think you answered this yourself within a complicated three-way
exchange. Any way, for what you want an answer could be

foreach x in adapt market technology {
        su $`x'
}
Nick
njcoxstata@gmail.com


On 19 February 2014 12:43, Nick Bornschein <nick.bornschein@gmail.com> wrote:
> Thanks Maarten,
>
> but I created the vars1... just as an example. In reality my global macros
> are called adapt, market and so on...
>
>
> Am 19.02.14 13:37, schrieb Maarten Buis:
>
>> --- On Wed, Feb 19, 2014 at 1:23 PM, Nick Bornschein wrote:
>>>
>>> I defined 3 global macros, each of them containing the names of
>>> variables:
>>> (... means there are a lot more variables in it)
>>>
>>> global var1 "hope truth..."
>>> global var2 "life death..."
>>> global var3 "never loose..."
>>>
>>> Now I want to summarize the global macros in blocks with:
>>>
>>> foreach x of global var1 var2 var3 {
>>> su `x'
>>> }
>>>
>>> But it does not work, it always runs through all variables without
>>> creating
>>> blocks.
>>
>>
>> Here is how I would do this:
>>
>> *------------------ begin example ------------------
>> sysuse auto
>> global var1 foreign rep78
>> global var2 mpg weight
>> global var3 trunk length
>>
>> forvalues i = 1/3 {
>>      sum ${var`i'}
>> }
>> *------------------- end example -------------------
>> * (For more on examples I sent to the Statalist see:
>> * http://www.maartenbuis.nl/example_faq )
>>
>>
>> This is not exactly true, I tend to avoid global macros wherever I can:
>>
>> *------------------ begin example ------------------
>> sysuse auto
>> local var1 foreign rep78
>> local var2 mpg weight
>> local var3 trunk length
>>
>> forvalues i = 1/3 {
>>      sum `var`i''
>> }
>> *------------------- end example -------------------
>> * (For more on examples I sent to the Statalist see:
>> * http://www.maartenbuis.nl/example_faq )
>>
>> Hope this helps,
>> Maarten
>>
>> ---------------------------------
>> Maarten L. Buis
>> WZB
>> Reichpietschufer 50
>> 10785 Berlin
>> Germany
>>
>> http://www.maartenbuis.nl
>> ---------------------------------
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