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From |
Brandon Olszewski <olszewski.brandon@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Assistance with manipulating a social network dataset? |

Date |
Wed, 12 Oct 2011 11:59:38 -0700 |

Yes! That's what I needed! The http://www.ats.ucla.edu/stat/stata/faq/dyad_ids.htm page sorted it all out for me - very well written with a clear example. Thank you, Nick. Brandon On Tue, Oct 11, 2011 at 4:36 PM, Nick Cox <njcoxstata@gmail.com> wrote: > Your last question is addressed in > > SJ-8-4 dm0043 . Tip 71: The problem of split identity, or how to group dyads > . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox > Q4/08 SJ 8(4):588--591 (no commands) > tip on how to handle dyadic identifiers > > Nick > > On Tue, Oct 11, 2011 at 11:05 PM, Brandon Olszewski > <olszewski.brandon@gmail.com> wrote: > >> I have a social network dataset, and I can’t figure out how to perform >> the proper manipulations. People in rows were asked if they know >> people listed in columns. In cells, “0” indicates two people don’t >> know each other, and “1” indicates otherwise. So what I have looks >> like this: >> Adam Beth Charlie >> Adam 1 1 0 >> Beth 0 1 0 >> Charlie 0 1 1 >> >> Note that while Adam claims to know Beth, Beth doesn’t claim the same, >> and while Beth says she doesn’t know Charlie, he says otherwise. For >> my purposes, I want to assume that if anyone says they know someone >> else, to treat it as a “1” both ways. >> >> The software I want to use (Sonoma) wants the data in one of two >> formats. Here’s the wide option, which offers only one half the >> matrix, with “1” coded in the diagonal and “.” coded in the bottom >> half, with max values for combinations in cells: >> Adam Beth Charlie >> Adam 1 1 0 >> Beth . 1 1 >> Charlie . . 1 >> >> Question 1: How would I do this in Stata? I looked at -help mata-, but >> I don’t even know if that’s the right direction. Is it? If not, how >> might I do it? This option seems more difficult for me (given my >> familiarity with Stata’s functionality) than the “long option” below. >> >> Here’s the long option, which seems more feasible for me, given my >> level of skill. Note that each combination is listed just once, again >> with maximum values: >> Adam Adam 1 >> Adam Beth 1 >> Adam Charlie 0 >> Beth Beth 1 >> Beth Charlie 1 >> Charlie Charlie 1 >> >> Question 2: I can get the data to long format fine no problem. But end >> up with duplicates of combinations, as Adam is asked about Ben, and >> Ben is asked about Adam (i.e. a total of 9 observations, rather than >> the six above). How could I drop duplicate combinations, saving only >> the max value for each? While I am pretty familiar with the >> -duplicates- set of commands, I’m running into the problem that I >> don’t know how to use the command since combinations go both ways, >> where Adam-Beth is a duplicate of Beth-Adam. I’ve also thought about >> it substituting numbers for people (i.e. 1-2 & 2-1), but that doesn’t >> change my problem that I can’t figure out how to tell Stata to treat >> those as duplicates. >> > > * > * 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: Assistance with manipulating a social network dataset?***From:*Nick Cox <njcoxstata@gmail.com>

**References**:**st: Assistance with manipulating a social network dataset?***From:*Brandon Olszewski <olszewski.brandon@gmail.com>

**Re: st: Assistance with manipulating a social network dataset?***From:*Nick Cox <njcoxstata@gmail.com>

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