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st: RE: drop observations - if statement
From
Andrew Maurer <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: RE: drop observations - if statement
Date
Wed, 5 Mar 2014 22:56:38 +0000
Are you using an older version of Stata? Didn't you use to have to manually force strings to the appropriate length? Eg count if cusip == " " (10 spaces).
Andrew Maurer
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of R Zhang
Sent: Wednesday, March 05, 2014 4:42 PM
To: [email protected]
Subject: st: drop observations - if statement
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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