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]
st: RE: create local with specific value of a variable
From
"MacLennan, Graeme" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: RE: create local with specific value of a variable
Date
Wed, 20 Feb 2013 15:54:35 +0000
Pablo asked:
Sometimes I need to save in a local a specific value of a variable and I cannot do it because creating a local does not support "if" neither "in" conditions. For instances, let's suppose that I have two
variables: "x" and "y". Variable "x" goes from 1 to 100 and "y" is a random vector. Now, how can I save in a local the value of "y" when "x" is, for example, 50? In other words, I would like to do something like this:
local y50 = y if x == 50
Something like this perhaps?
*** example start ***
* This assumes that y is constant within categories of x
clear
sysuse auto
local num = 41
summ mpg if mpg == `num'
local mpg`num' = r(mean)
di "`mpg41'"*** example end ***
*** example end ***
HTH, Graeme.
Graeme MacLennan
Senior Statistician
Health Services Research Unit
Health Sciences Building
University of Aberdeen
Foresterhill
Aberdeen AB25 2ZD
Tel: +44 (0)1224 438147
Fax +44 (0)1224 438165
Email: [email protected]
Web: www.abdn.ac.uk/hsru
Sometimes I need to save in a local a specific value of a variable and I cannot do it because creating a local does not support "if" neither "in" conditions. For instances, let's suppose that I have two
variables: "x" and "y". Variable "x" goes from 1 to 100 and "y" is a random vector. Now, how can I save in a local the value of "y" when "x" is, for example, 50? In other words, I would like to do something like this:
local y50 = y if x == 50
I know that is not possible and it is actually a "heresy" in Stata language but it might give you an idea of what I need.
Thank you so much for your help and any idea is more that welcome.
Best
----
Pablo Bonilla
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/
The University of Aberdeen is a charity registered in Scotland, No SC013683.
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/