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From |
Nick Cox <njcoxstata@gmail.com> |

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

Subject |
Re: st: Creating a variable with a value conditional on other variables |

Date |
Sat, 9 Apr 2011 13:28:51 +0100 |

This is an FAQ. See FAQ . . Creating variables recording prop. of the other members of a group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox 4/05 How do I create variables summarizing for each individual properties of the other members of a group? http://www.stata.com/support/faqs/data/members.html. But in any case, there is a direct approach that will seem obvious when explained. First, the mean of all the others is naturally just (sum of all the others) / (count of all the others) and "sum of all the others" is sum of all - this value so we can go su myvar, meanonly gen meanothers = (r(sum) - myvar) / (r(N) - 1) This needs a fix for when -myvar- is missing, too. That is going to be, I think, gen meanothers = (r(sum) - cond(missing(myvar), 0, myvar)) / (r(N) - 1) but the FAQ goes through this and a variety of problems in the same territory. Nick On Sat, Apr 9, 2011 at 12:19 PM, Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com> wrote: > -jackknife- it: > > ********************* > sysuse auto, clear > jackknife r(mean), keep: su mpg > su mpg > li _jk_1 in 1/10 > ********************* > > The variable you need is stored as "_jk_1". > > T > > On Sat, Apr 9, 2011 at 4:05 AM, Nick K <nick.stata@gmail.com> wrote: >> Hi, >> >> I'm new to Stata and am having a hard time figuring out a relatively >> simple problem. I'm experienced with other programming languages and >> SQL so pseudo code may get my point across more clearly. >> >> foreach(observation) >> { >> variable Xi = average(Y) if A != Ai >> } >> >> Basically it would go over every observation and create a variable of >> the average of some other variable NOT INCLUDING the variable's value >> for the current row. So X is the average of Y for all observations >> EXCEPT the current one. >> >> Thanks * * 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: Creating a variable with a value conditional on other variables***From:*Nick K <nick.stata@gmail.com>

**Re: st: Creating a variable with a value conditional on other variables***From:*Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com>

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