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Re: st: Loop-within-loop error while looping over observations for a microsimulation


From   Stephen Cranney <cranney.stephen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Loop-within-loop error while looping over observations for a microsimulation
Date   Mon, 6 Aug 2012 09:53:15 -0600

Thanks for catching that; it's still giving me the "weights not
allowed" error message though, even when I delete the extra space.

I found this prior Statlist post that seems to indicate that Stata
triggers the no weights allowed warning when the `i' is placed to the
left of the equals sign:

http://www.stata.com/statalist/archive/2006-08/msg00976.html

So I changed my code to the following, but I'm still getting the "no
weights allowed" message.

local N = _N
forvalues i = 1/`N' {
	forvalues j= 0/12 {
		replace childbirth= rbinomial(1, probabilityconceive) if childbirth== .f
		replace childbirth[_n+j]== .i if (childbirth==1) in `i'
		}
	}

Best,



On Mon, Aug 6, 2012 at 9:32 AM, daniel klein
<klein.daniel.81@googlemail.com> wrote:
> I did not follow closely, but there is a space between <childbirth>
> and  <[`i']> in your code, probably causing Stata to interpret <[`i']>
> as some kind of weight, rather than a subscript.
>
> Best
> Daniel
>
> --
> [...]
> However, when I change the
> monthsofpostpartum variable to a constant (in this case 12), it's
> giving me a "weights not allowed" sign.
> *
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