Good question. -1 is my mistake. I meant +1, as for
example your measure of DISTRESS is 4 whenever any
of the variables concerned is 3. Sorry about that.
Nick
[email protected]
Winfred Avogo
> Thanks your code helped. But may I ask what the -1 represents, just a
> gist about your code.
Nick Cox
> This statement is not a definition, but background
> comment. My point was that I cannot help if you
> don't trust your own code, as I don't know exactly
> what you are trying to calculate.
>
> My code offers one simplification of your code.
>
> gen distress = max(h3sp5, h3sp6, rr_h3sp7, h3sp8, h3sp9, h3sp10,
> rr_h3sp11, h3sp12, h3sp13) - 1
>
> may even be right. I can't offer a shorter solution.
>
> My guess is that you don't need any Stata emulation
> of SAS arrays to solve your problem.
Winfred Avogo
> > Thanks for assisting Nick.
> >
> > My definition of DISTRESS comprises the nine variables
> outlined asking
> > adolescents a series of questions bothering on
> psychological distress
> > during the last seven days, e.g. things that bothered them,
> > inability to
> > shake off blues, difficulty concentrating and being depressed.
> >
> > I have reviewed the link on Array but seem not to
> understand it as it
> > applies to what I am trying to do. Could it be simplified?
Nick Cox
> > Not being aware of your definition of DISTRESS I can't offer
> > any checks here.
>
> > gen distress = .
> > replace distress = max(h3sp5, h3sp6, rr_h3sp7, h3sp8, h3sp9, h3sp10,
> > rr_h3sp11, h3sp12, h3sp13) - 1
> >
> > looks like one equivalent of your code.
> >
> > See also
> > http://www.stata.com/support/faqs/data/arrays.html
Winfred Avogo (modulo deprecated HTML, etc.)
> > I am working on Add health data in Stata 9 and wish to
> create a single
> > measure of DISTRESS using 9 identified variables all on a
> > scale of 0-3.
> > I have tried Stata's -generate- and
> > -replace- command below but did not trust the results I obtained.
> >
> > generate distress=.
> > replace distress=1 if
> > h3sp5==0|h3sp6==0|rr_h3sp7==0|h3sp8==0|h3sp9==0|h3sp10==0|rr_h
> > 3sp11==0|h
> > 3sp12==0|h3sp13==0
> > replace distress=2 if
> > h3sp5==1|h3sp6==1|rr_h3sp7==1|h3sp8==1|h3sp9==1|h3sp10==1|rr_h
> > 3sp11==1|h
> > 3sp12==1|h3sp13==1
> > replace distress=3 if
> > h3sp5==2|h3sp6==2|rr_h3sp7==2|h3sp8==2|h3sp9==2|h3sp10==2|rr_h
> > 3sp11==2|h
> > 3sp12==2|h3sp13==2
> > replace distress=4 if
> > h3sp5==3|h3sp6==3|rr_h3sp7==3|h3sp8==3|h3sp9==3|h3sp10==3|rr_h
> > 3sp11==3|h
> > 3sp12==3|h3sp13==3
> >
> > I would be happy if I could obtain assistance to do this more
> > efficiently. Will array code in Stata like is done in SAS be
> > appropriate here.
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