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From |
Kari Hexem <khexem@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Combinations of 3 |

Date |
Sun, 19 Dec 2010 19:29:00 -0500 |

Thank you! It worked!! On Sun, Dec 19, 2010 at 7:16 PM, Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com> wrote: > ****************************************** > // generate some data > clear > set obs 100 > g v = runiform() > forv i=1/6{ > g n`i' = runiform() > } > // sum variables > forv i=1/5 { > forv j = `=`i'+1'/6 { > g v_n`i'_n`j' = v + n`i' + n`j' > } > } > su > ****************************************** > > T > On Sun, Dec 19, 2010 at 4:03 PM, Kari Hexem <khexem@gmail.com> wrote: >> Hi, >> >> I would like to sum the numbers of variable v with 6 other variables: >> n1, n2, n3, n4, n5, n6, >> in combinations of 3. So the results would be the sums of the >> following variables, >> identified using 15 combinations (6 choose 2), or, to spell it out, >> the sums of each of these >> following possibilities: >> v-n1-n2 >> v-n1-n3 >> v-n1-n4 >> v-n1-n5 >> v-n1-n6 >> v-n2-n3 >> v-n2-n4 >> v-n2-n5 >> v-n2-n6 >> v-n3-n4 >> v-n3-n5 >> v-n3-n6 >> v-n4-n5 >> v-n4-n6 >> v-n5-n6 >> >> I can get the sum of the first two of the 3 variables by using the >> following code: >> forvalues i=1(1)6 { >> gen sum`i' = v + n`i' >> } >> >> but I can't figure out how to add in the 3d variable, which can't be a >> repeat of the 2nd variable (ie. v-n1-n1 is not allowed). Thoughts? I >> feel like it should have something to do with nested loops, or the >> -selectvars- command, but I am totally stuck. Any help would be >> greatly appreciated. >> >> Thanks, >> Kari >> * >> * 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/ >> > > > > -- > To every ω-consistent recursive class κ of formulae there correspond > recursive class signs r, such that neither v Gen r nor Neg(v Gen r) > belongs to Flg(κ) (where v is the free variable of r). > > * > * 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: Combinations of 3***From:*Kari Hexem <khexem@gmail.com>

**Re: st: Combinations of 3***From:*Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com>

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