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Re: st: Defining upper limit of loop


From   "Thomas, Anthony" <anthony_h_thomas@brown.edu>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Defining upper limit of loop
Date   Wed, 11 Dec 2013 17:43:32 -0500

Yes, a forval loop will work for that. Nick's explanation describes
how very well. I had thought you wanted to actually reference a
variable's name (i.e. a string). Just be aware that the macro `Z'
needs to evaluate to numeric not string. Sorry for the confusion.

Anthony

On Wed, Dec 11, 2013 at 5:30 PM, Nabin Kafle <nkafle89@gmail.com> wrote:
> I want to loop a cycle number of times indicated by a number in a variable name.
> For example:
> X Y Z
> 1 2 1
> 2 3 4
> 3 2 2
> 3 2 2
> 4 2 2
> . . . .
>
> gen sum=X
> forvalues i=1/"Z" {
> replace sum=X+X[_n+`i']
> }
>
> What would be other way to do such if it is not possible by -forvalues- command.
>
> On Wed, Dec 11, 2013 at 4:18 PM, Thomas, Anthony
> <anthony_h_thomas@brown.edu> wrote:
>> Stata probably will not let you do that. Variable names cannot be a
>> number, and "forval" type loops expect a numeric range (i.e. "variable
>> name" would have to be a number). If you want to use variables in a
>> loop, consider using:
>>
>> foreach i of varlist "varlist"{
>>
>>      commands
>>
>> }
>>
>> Anthony
>>
>> On Wed, Dec 11, 2013 at 5:08 PM, Nabin Kafle <nkafle89@gmail.com> wrote:
>>> Is there a way that I can use the forvalues command in stata in a way
>>> that I upper value of the loop can be defined from the varibale list.
>>>
>>> forvalues i = 1/"var name" {
>>> code for loop
>>> *
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>
>
>
> --
> Nabin Kafle
> *
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