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Re: st: Is there a better way of allocating individuals into different categories based on the probability of an event?
From
Maarten Buis <[email protected]>
To
[email protected]
Subject
Re: st: Is there a better way of allocating individuals into different categories based on the probability of an event?
Date
Mon, 25 Mar 2013 09:40:19 +0100
On Sat, Mar 23, 2013 at 4:16 AM, Gwinyai Masukume wrote:
> Is there a better way of executing the code below which assigns
> individuals into the Non-smoker and Smoker categories based on the
> probability of smoking in pregnancy? <snip> Assuming 84% of
> women do not smoke during pregnancy
I would rewrite the lines
> gen smoker1=int(1+(50000-1)*runiform())
> gen smoker=0 if smoker1 < 42000
> replace smoker=1 if smoker1 >= 42000
like this:
gen byte smoker = runiform() < .16
For more see:
M.L. Buis (2007), "Stata tip 48: Discrete uses for uniform()", The
Stata Journal, 7(3), pp. 434-435.
<http://www.stata-journal.com/article.html?article=pr0032>
-- Maarten
---------------------------------
Maarten L. Buis
WZB
Reichpietschufer 50
10785 Berlin
Germany
http://www.maartenbuis.nl
---------------------------------
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