Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Generating variable in panel dataset
From
Sergiy Radyakin <[email protected]>
To
[email protected]
Subject
Re: st: Generating variable in panel dataset
Date
Tue, 28 Dec 2010 19:28:51 -0500
On Tue, Dec 28, 2010 at 6:57 PM, Shikha Sinha <[email protected]> wrote:
> Dear all,
>
> I have a county level panel data for two years: 2002 and 2008. I want
> to create a binary variable "low" which categorizes counties by median
> value of variable stroke in 2002. For example.
>
> County Year Avg stroke Low
> A 2002 0.12 1
> B 2002 0.17 1
> C 2002 0.20 1
> D 2002 0.24 0
> E 2002 0.28 0
> A 2008 0.10
> B 2008 0.11
> C 2008 0.34
> D 2008 0.45
> E 2008 0.23
>
> In year 2002, the median value of stroke is 0.20, and I have coded
> counties with avg stroke <= median stroke as low. so, A, B, C are
> low=1 and D.E are low=0.
> Now I want to code A,B, C in 2008 as low=1 and D,E as low=0. I do not
> want to consider abg stroke in these counties in 2008. Is there a
> simple way to complete the column "low"?
> Hope my query is clear.
Not quite. Do you want to code A,B,C in 2008 as low=1 because their value
was 1 in 2002? or because their 2008 value is below the 2002 median value?
See which one fits from below. (Or provide more info).
Best, Sergiy Radyakin
clear
input str1 County Year Avgstroke Low
A 2002 0.12 1
B 2002 0.17 1
C 2002 0.20 1
D 2002 0.24 0
E 2002 0.28 0
A 2008 0.10 .
B 2008 0.11 .
C 2008 0.34 .
D 2008 0.45 .
E 2008 0.23 .
end
bys County (Year): replace Low=Low[1] // 2002 must be smallest
list, clean noobs
clear
input str1 County Year Avgstroke Low
A 2002 0.12 1
B 2002 0.17 1
C 2002 0.20 1
D 2002 0.24 0
E 2002 0.28 0
A 2008 0.10 .
B 2008 0.11 .
C 2008 0.34 .
D 2008 0.45 .
E 2008 0.23 .
end
//centile Avgstroke
//local medianstroke=r(c_1)
local medianstroke = 0.20
replace Low = (Avgstroke<=`medianstroke')
list, clean noobs
>
> Thanks.
> Shikha
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/