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st: drop multiple observations which are strings
From
Shubhabrata Mukherjee <[email protected]>
To
stata forum <[email protected]>
Subject
st: drop multiple observations which are strings
Date
Tue, 14 Feb 2012 11:57:50 -0800 (PST)
Hi All,
I am working with genetic data and have a list of almost 11 million observations (each is a string; e.g. rs12345, rs23456 etc) under the SNP variable in a results file. I have a separate list of SNPs (around 5000) which should be excluded from the results file.
Now, some of the 5000 SNPs may not be there in the results file. I don't know which ones of the 5000 are present/absent in the results file. What would be the best way to drop any SNP from the results file which appears in the exclude SNP list?
Thanks,
-Joey
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