[R] Creating a weighted sample - Help

From: LouiseS <louise_at_sinfield.uk.net>
Date: Wed, 02 Mar 2011 08:50:06 -0800 (PST)


Hi

I'm new to R and most things I want to do I can do but I'm stuck on how to weight a sample. I have had a look through the post but I can't find anything that addresses my specific problem. I am wanting to scale up a sample which has been taken based on a single variable (perf) which has 4 attributes H,I, J and K. The make up of the sample is shown below:-

Perf	         Factored Count (A)	Raw Count (B)	Factor (A/B)
H	               5,945	                       2,924	        2.033174
I 	               1,305	                       2,436	        0.535714
J 	               2,000	                       2,092	        0.956023
K	                750	                       1,225	        0.612245


I then want to produce all further analysis based on this factored sample. I can produce a weighted sample in SAS using the weight function which I have shown below

wt=0;

if perf='H' then wt=2.033174;
if perf='I ' then wt=0.535714;
if perf='J ' then wt=0.956023;
if perf='K ' then wt=0.612245;

proc freq data=DD.new;
tables resdstat;
weight wt;
run;

Does anyone know how to reproduce this in R?

Thanks very much

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Received on Wed 02 Mar 2011 - 20:40:45 GMT

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