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From |
"Christian Holz (Stata list)" <statalist@holz.ca> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: using value of one variable to read value of specific other variable out of a list of variables |

Date |
Mon, 9 May 2011 14:14:44 -0400 |

Hi Arne, what about this? generate z=. replace z=x1 if y==1 replace z=x2 if y==2 replace z=x3 if y==3 or more generically (ie if there are more than 3 possibilities) generate z=. foreach n of numlist 1/3 { replace z=x`n' if y==`n' } Cheers, Christian On Mon, May 9, 2011 at 1:30 PM, <arne.weiss@uni-erfurt.de> wrote: > Dear everyone, > > I am sure there is some obvious solution that I am not seeing, but I > couldn't figure it out: > 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. > > Many thanks in advance! > Arne > > -- > Dr. Arne Robert Weiß > University of Erfurt Nordhäuser Str. 63, D-99089 Erfurt Tel: +49 361 737 > 4522 > Fax: +49 361 737 4569 > http://www.uni-erfurt.de/mikrooekonomie/lehrstuhlteam/dr-arne-weiss > http://arneweiss.blogspot.com > * > * 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/

**Follow-Ups**:**Re: st: using value of one variable to read value of specific other variable out of a list of variables***From:*Nick Cox <njcoxstata@gmail.com>

**References**:**st: using value of one variable to read value of specific other variable out of a list of variables***From:*arne.weiss@uni-erfurt.de

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