Nick Cox [mailto:[email protected]]
> David Kantor
>
> > Another issue to consider is, do you use Stata 8 or an
> > earlier edition? If
> > you have Stata 8, then to test canter==. is to seek a
> > specific missing
> > value: . But there are others: .a, .b, .c, etc.. If you
> > want to get all
> > missing values, then you should test...
> > missing(canter)
> > or, equivalently,
> > mi(canter)
> > or, equivalently,
> > canter <.
>
> The last is a typo.
>
> canter < .
>
> is true for non-missings.
>
> canter >= .
>
> is true for missings. While we're on the subject,
> note that mi(canter) would catch the case when
> canter was a string missing, but canter == . or
> canter >= . would then be illegal.
>
>
The last is a typo.
I meant: "when canter was a string variable".
Any tpyos in this message?
Nick
[email protected]
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