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From |
Austin Nichols <austinnichols@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: programming question for instrument scoring with weights |

Date |
Thu, 9 Jun 2011 12:06:32 -0400 |

Stas-- Not well, though: . egen m=rowtotal(rep78 price), missing . su m rep78 price Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- m | 74 6168.432 2949.481 3294 15909 rep78 | 69 3.405797 .9899323 1 5 price | 74 6165.257 2949.496 3291 15906 On Thu, Jun 9, 2011 at 12:02 PM, Stas Kolenikov <skolenik@gmail.com> wrote: > Oops. Thanks, Austin! There's -missing- option of -egen = rowtotal()- > controlling for the missing value issue, too. > > On Thu, Jun 9, 2011 at 10:48 AM, Austin Nichols <austinnichols@gmail.com> wrote: >> Stas; Marguerite <mbaty1@son.jhmi.edu>: >> I think the -egen- "function" below is meant to be rowtotal(), not >> total(). But beware of missing values counting as zeros in such a >> formulation. >> >> On Thu, Jun 9, 2011 at 10:52 AM, Stas Kolenikov <skolenik@gmail.com> wrote: >> ... >>> I am assuming that your items are coded 1 for yes, 0 for no. Or you >>> can do this sequentially: >>> >>> egen int total_score = total( item1 item2 [fill in the dots] item19 ) >>> replace total_score = total_score + 4 if item2 == 1 >>> ... >>> replace total_score = total_score - 3 if item3a == 1 >>> >>> All of these ways are cumbersome, and the more lines of code you have, >>> the more likely it is you will have an error somewhere. The choice >>> between different ways of coding your problem is a matter of >>> aesthetics, and how readable the code will be to you and other users >>> of it. * * 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: programming question for instrument scoring with weights***From:*Stas Kolenikov <skolenik@gmail.com>

**References**:**st: programming question for instrument scoring with weights***From:*"Lucea, Marguerite" <mbaty1@son.jhmi.edu>

**Re: st: programming question for instrument scoring with weights***From:*Stas Kolenikov <skolenik@gmail.com>

**Re: st: programming question for instrument scoring with weights***From:*Austin Nichols <austinnichols@gmail.com>

**Re: st: programming question for instrument scoring with weights***From:*Stas Kolenikov <skolenik@gmail.com>

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