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RE: st: Count observations
From
"Feiveson, Alan H. (JSC-SK311)" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
RE: st: Count observations
Date
Thu, 27 Jun 2013 12:34:56 -0500
Another simple way is
qui tab auto
di r(r)
Al Feiveson
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: Thursday, June 27, 2013 12:23 PM
To: [email protected]
Subject: Re: st: Count observations
There was a review of this area in
http://www.stata-journal.com/sjpdf.html?articlenum=dm0042
The article discusses several ways to approach the question, including the program -distinct-, which you could download from the Stata Journal site. (-search distinct- first.)
. sysuse auto
(1978 Automobile Data)
. distinct
| Observations
| total distinct
--------------+----------------------
make | 74 74
price | 74 74
mpg | 74 21
rep78 | 69 5
headroom | 74 8
trunk | 74 18
weight | 74 64
length | 74 47
turn | 74 18
displacement | 74 31
gear_ratio | 74 36
foreign | 74 2
Nick
[email protected]
On 27 June 2013 18:13, Miguel Angel Duran Munoz <[email protected]> wrote:
> Hi, Statalisters. I have a doubt that must have a very simple
> solution, but I have not been able to find it. I have a variable where
> some numbers appear more than once. And I would like to know the
> number of different numbers; ie, variable = 1 1 1 2 3 4 4 4..., so
> there are 4 different numbers.
>
> Thanks in advance.
>
> Miguel.
>
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