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Re: st: How to put max and min values in a loop


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: How to put max and min values in a loop
Date   Wed, 27 Mar 2013 14:26:47 +0000

Not quite vacuous in the sense that missings are excluded, as Maarten
points out. Whether excluding missings is the purpose here is
completely unclear.

It is elementary, but asking unclear questions makes for problematic answers.

Nick

On Wed, Mar 27, 2013 at 2:23 PM, Nick Cox <njcoxstata@gmail.com> wrote:
> This is likely to be wrong for several reasons.
>
> -min()- and -max()- in this context can only be Stata functions and
> each requires two or more arguments. This is not quite explicit in the
> help.
>
> Also, even when legal, statements including -min()- or -max()- will
> only evaluate within observations.
>
> You assume that we know what you want to do, which is not true.
> However, we can guess that you want minimum and maximum of some
> variable, in which case -summarize- first will give you r(min) and
> r(max), which you can use within -inrange()-. -summarize, meanonly- is
> sufficient if min and max are all you need.
>
> But, but, but: it is vacuous that any variable lies between its
> minimum and maximum, so there is no point to doing this unless the
> calculation of -summarize- refers to something different, e.g. a
> different subset or a different variable.
>
> Nick
>
> On Wed, Mar 27, 2013 at 2:11 PM, Xixi Lin <winnielxx@gmail.com> wrote:
>
>> I am trying to use inlist(var, min(var), max(var)) in a loop; however,
>> min(var) and max(var) seems to be wrong codes, does anyone know how to
>> code it in a right way?
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