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: RE: using value of one variable to read value of specific other variable out of a list of variables
From
Nick Cox <[email protected]>
To
"'[email protected]'" <[email protected]>
Subject
st: RE: RE: using value of one variable to read value of specific other variable out of a list of variables
Date
Mon, 9 May 2011 18:52:48 +0100
For a longer list of x variables, you could do this:
gen z = .
qui forval j = 1/15 {
replace z = x`j' if y == `j'
}
Nick
[email protected]
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox
Sent: 09 May 2011 18:35
To: '[email protected]'
Subject: st: RE: using value of one variable to read value of specific other variable out of a list of variables
gen z = cond(y == 1, x1, cond(y == 2, x2, x3))
Nick
[email protected]
[email protected]
I want to create a variable (z) that contains the value from one
variable out of a list of variables (say x1 - x3) depending on the
valuable of another variable (y). The list of variables is a) named in a
way that the value of y could be used to refer to the correct name of
the variable and b) ordered so that the value of y could also be used a
locational reference (as the offset command does in Excel). I don't
think b) could work in STATA, but I couldn't find a solution for a)
either. See below an example. Therein, z in the first row is supposed to
be 1 and in the second row 5 (if y = 2, z is supposed to have the value
of x2).
x1 x2 x3 y
1 2 3 1
0 5 4 2
Here is the closest I came towards a solution:
local a = y
gen z = x`a'
This command, however, only does half the job as the value of the local
a is not being rest for every row. I would be very happy for any advice.
*
* 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/