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Re: st: RE: drop observations - if statement
From
Richard Williams <[email protected]>
To
[email protected], "[email protected]" <[email protected]>
Subject
Re: st: RE: drop observations - if statement
Date
Wed, 05 Mar 2014 19:23:04 -0500
I don't know, but if so how about
drop if missing(cusip)
Also as Jeph points out, the simplest explanation is that there are
no missing data.
At 05:56 PM 3/5/2014, Andrew Maurer wrote:
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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Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
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