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From |
Richard Goldstein <richgold@ix.netcom.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: generate sum of variables & ignore missing |

Date |
Thu, 05 Jun 2008 08:34:42 -0400 |

use egen with the rowtotal option; e.g. egen varD=rowtotal(varA varB varC) Rich Andrea Bennett wrote:

Hi,

I guess this is an easy task for somebody more experienced. I have 3 columns (varA, varB, varC) containing dummy variables (0, 1, missing values "."). I would like to generate "varD" the sum of each row, e.g. if varA==1 varB==0 varC==1 I should have varD==2. This works clearly fine when there are no missing values (varD= varA + varB + varC). But is there an easy way to let Stata read a missing value as "0" so that varA==1 varB==. varC==1 would result in varD==2 (without actually replacing the missing values with "0")? I am trying to get it to work with -missing()- but so far have not succeeded.

Many thanks for your consideration,

Andrea

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**Follow-Ups**:**Re: st: generate sum of variables & ignore missing***From:*Andrea Bennett <mac.stata@gmail.com>

**References**:**st: generate sum of variables & ignore missing***From:*Andrea Bennett <mac.stata@gmail.com>

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