st: AW: counting variables within a row

["Martin Weiss" <martin.weiss1@gmx.de>]

<> 

Re "rowwise", also see NJC`s column at
http://www.stata-journal.com/article.html?article=pr0046



HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Casey P. Durand
Gesendet: Mittwoch, 9. Juni 2010 01:16
An: statalist@hsphsun2.harvard.edu
Betreff: st: counting variables within a row

Hi folks,

I have a dataset with 18 variables called met_aone-met_aeighteen.
Within each observation, I'm trying to count the number of these
variables with values which satisfy three criteria.  I thought I could
handle this with -egen- and the lines of code I originally wrote are:

egen lightcount_d1= rownonmiss ( met_aone-met_aeighteen) if (
met_aone-met_aeighteen)> 0 & ( met_aone-met_aeighteen)< 3
egen modcount_d1= rownonmiss (met_aone-met_aeighteen) if
(met_aone-met_aeighteen)>= 3.0000 & (met_aone-met_aeighteen)< 6
egen hardcount_d1= rownonmiss (met_aone-met_aeighteen) if
(met_aone-met_aeighteen)>= 6.0000 & (met_aone-met_aeighteen)< .

The problem as I quickly realized is that it is only counting
variables when every single value in the row satisfies the if
requirement.  What I can't figure out is how to assess each variable
individually for meeting the criteria, but ultimately producing a new
variable with the total within the observation which meets my
criteria.

Any thoughts on how to handle this?

Thanks in advance.

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