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Re: st: RE: generate random sample
From
[email protected] (Brendan Halpin)
To
[email protected]
Subject
Re: st: RE: generate random sample
Date
Mon, 16 Jan 2012 18:04:26 +0000
> Say, how to generate 3 independent random numbers from population
> (1,2,3,4,5) with probability distribution (0.2, 0.1, 0.3, 0.3,0.1)?
This is how I would do it:
| gen draw = runiform()
|
| gen x = .
|
| replace x = 1 if inrange(draw, 0, 0.2)
| replace x = 2 if inrange(draw, 0.2, 0.2+0.1)
| replace x = 3 if inrange(draw, 0.2+0.1, 0.2+0.1+0.3
| replace x = 4 if inrange(draw, 0.2+0.1+0.3, 0.2+0.1+0.3+0.3)
| replace x = 5 if inrange(draw, 0.2+0.1+0.3+0.3, 0.2+0.1+0.3+0.3+0.1)
or (since the cut points are constants, not variables) just recode
the appropriate ranges of runiform() into 1/5.
Brendan
--
Brendan Halpin, Department of Sociology, University of Limerick, Ireland
Tel: w +353-61-213147 f +353-61-202569 h +353-61-338562; Room F1-009 x 3147
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