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From |
Quang Nguyen <quangn@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: How to append these two data sets |

Date |
Mon, 13 Apr 2009 04:20:31 -1000 |

Thanks Nick and Martin. Actually, the question is a bit trickier than "append" can handle. The structure of data 1 and 2 are different, thus, the append would result in all missing values for the mitsmatch variables. Thus, append using data2 will result in all missing values for x, y, z in the combined data set. Actually, I would like to have the combined data as follows: Combined data: id x y z v 1 4 a 7 missing 1 4 b 8 missing 1 4 c 9 missing 1 4 missing missing 4 1 4 missing missing 2 Given: Data 1 id v 1 4 1 2 2 6 2 7 ------------- Data 2: id x y z 1 4 a 7 1 4 b 8 1 4 c 9 2 6 a 7 2 6 b 8 2 6 c 9 On Mon, Apr 13, 2009 at 3:43 AM, Quang Nguyen <quangn@gmail.com> wrote: > Dear All: > > Suppose I have the 2 following data set1: > > Data 1 > id v > 1 4 > 1 2 > 2 6 > 2 7 > ------------- > > Data 2: > id x y z > 1 4 a 7 > 1 4 b 8 > 1 4 c 9 > 2 6 a 7 > 2 6 b 8 > 2 6 c 9 > > > Note that _x_ is a fixed effect in data 2 as well as the combined data > set. Given that, do you know how I can append data 1 to data 2 so > that the combined data set will have infor from both data 1 and 2 and > some missing values due to mismatch between v and (y,z). Specifically, > the combined data for the first observation looks like the following: > > Combined data: > > id x y z v > 1 4 a 7 mis > 1 4 b 8 mis > 1 4 c 9 mis > 1 4 mis mis 4 > 1 4 mis mis 2 > ...... > > > Many thanks! > > > > -- > "My father gave me the greatest gift anyone could give another person, > he believed in me." - Jim Valvano > > > > -- > "My father gave me the greatest gift anyone could give another person, > he believed in me." - Jim Valvano > > * > * 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/ > -- "My father gave me the greatest gift anyone could give another person, he believed in me." - Jim Valvano * * 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**:**AW: st: How to append these two data sets***From:*"Martin Weiss" <martin.weiss1@gmx.de>

**RE: st: How to append these two data sets***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**st: How to append these two data sets***From:*Quang Nguyen <quangn@gmail.com>

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