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From |
Eric Booth <ebooth@ppri.tamu.edu> |

To |
"<statalist@hsphsun2.harvard.edu>" <statalist@hsphsun2.harvard.edu> |

Subject |
Re: st: row wise summation in panel data for particular IDs |

Date |
Sun, 9 Jan 2011 22:14:58 +0000 |

<> Take a look at the responses to the thread here: http://www.stata.com/statalist/archive/2010-12/msg00887.html If this is really what you want, you can also do this: **********************! clear **setup** inp id year var1 1 2001 40 1 2002 50 1 2003 60 2 2001 400 2 2002 500 2 2003 600 3 2001 4000 3 2002 5000 3 2003 6000 end g var2 = int(abs(runiform()*10)) //create another var ** preserve collapse (sum) var1 var2 if id!=3, by(year) g id = 4 sa using.dta, replace restore ** append using "using.dta" l ******* ******* **better yet use tabout to view sums for id 1 & 2: ** cap which tabout if _rc ssc install tabout //install -tabout- ** tabout year using "sum_table.xls", /// replace sum c(sum var1 sum var2) f(0c) /// ptotal(both) h2(Summary Table) di as smcl `"Click to View: {browse "sum_table.xls"}"' **********************! - Eric __ Eric A. Booth Public Policy Research Institute Texas A&M University ebooth@ppri.tamu.edu Office: +979.845.6754 On Jan 9, 2011, at 3:57 PM, <pb2442@columbia.edu> wrote: > Dear all, > > I am required to take into account the changes in boundary of cities over a period so that all the information can be attributed to the parent cities at the start of the time period. I have already tried but could not find a similar case in previous threads. > > This is a panel data , say with id, year and vars. I need to merge > (sum or weighted sum) two particular ids completely to form a new one. > For instance, I have: > > id year var1 var2 var3 > 1 2001 40 > 1 2002 50 > 1 2003 60 > 2 2001 400 > 2 2002 500 > 2 2003 600 > 3 2001 4000 > 3 2002 5000 > 3 2003 6000 > > > desired Output will be like (summing up corresponding values of var1 in given year for id 1 and 2, keeping 3 intact and having the results in a newly created id, say 4). > > id year var1 var2 var3 > 1 2001 40 > 1 2002 50 > 1 2003 60 > 2 2001 400 > 2 2002 500 > 2 2003 600 > 3 2001 4000 > 3 2002 5000 > 3 2003 6000 > 4 2001 440 > 4 2002 550 > 4 2003 660 > > Any help will be appreciated. > > > Thanks. > > Prabhat > > * > * 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/

**References**:**st: row wise summation in panel data for particular IDs***From:*pb2442@columbia.edu

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