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Re: Re: st: Re: ifcmd question


From   n j cox <n.j.cox@durham.ac.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: Re: st: Re: ifcmd question
Date   Mon, 13 Nov 2006 09:54:49 +0000

Note also that this problem is documented at

I have an if command in my program that only seems to evaluate the first observation. What's going on?
http://www.stata.com/support/faqs/lang/ifqualifier.html

Nick
n.j.cox@durham.ac.uk

Robert Duval

This does the trick...

Michael Blasnik

> ..Not completely clear what you want, but if x>1 evaluates the first
> observation of x and compares that to 1, it doesn't look for any x > 1.
> Here's something that might do what you want:
>
> sum x, meanonly
> if r(max)>1 save hola.dat

Robert Duval

> > I am trying to pass a command to a whole dataset if a variable takes
> > certain values... For instance I would like Stata to save a file
> > hola.dat if variable x takes values >1...
> >
> > I tried
> >
> > if x>1 {
> > save hola.dat
> > }
> >
> > but at execution Stata doesn't do anything.
> >
> > Please note I don't want to filter obs. I just want the program to
> > save the current file under a given name if one of its variables takes
> > certain values.
> >
> > The problem is that ifcmd evaluates an exp and the command save
> > applies to the whole dataset and not to a subset of obs.
> >
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