[R] Is it the PPS samples i needed in R?

From: zhijie zhang <epistat_at_gmail.com>
Date: Fri 12 Jan 2007 - 15:09:09 GMT


Dear friends,
  I want to do a unequal probability sampling, that is, Probability Proportionate to size, Is it right for the following programs? Say my original dataset is:

 ID Population

 1     100
 2     200
 3     300

 IF the population is large ,then the corresponding ID has the large Probability to be selected.

sample(A$ID, size=2, replace = FALSE, prob = A$population) #suppose the dataset name is A.
Is it the PPS samples i needed ?
 Any suggestions are greatly welcome.

-- 
With Kind Regards,

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::\_)::(..):: :::::::)./::: ::::::(_/:::: ::::::::::::: [***********************************************************************] Zhi Jie,Zhang ,PHD Tel:86-21-54237149 epistat@gmail.com Dept. of Epidemiology,school of public health,Fudan University Address:No. 138 Yi Xue Yuan Road,Shanghai,China Postcode:200032 [***********************************************************************] oooO::::::::: (..):::::::::
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Received on Sat Jan 13 02:13:00 2007

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