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st: drop observations - if statement
From
R Zhang <[email protected]>
To
[email protected]
Subject
st: drop observations - if statement
Date
Wed, 5 Mar 2014 17:41:46 -0500
Hi all,
I used the following commands to drop observations based on a string
variable - CUSIP- that takes missing values, i.e. delete observations
with missing CUSIP,
drop if cusip==""
cusip is str10
(0 observations deleted)
could you explain why "(0 observations deleted)"?
thanks,
Rochelle
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