Note also that both numeric and
string missings are caught by -mi()-.
Nick
[email protected]
Kit Baum
> Easier, and nmissing (appropriately updated) gives the right answer,
> which count does not...
>
> Note that the count statement as given does not tell you how many
> missing values there are; it tells you how many are equal to ".".
> There are 27 kinds of missing values in Stata, and if you want to
> trap all of them,
>
> count if !(x<.)
>
> is needed:
>
> . tab rep78,missing
>
> Repair |
> Record 1978 | Freq. Percent Cum.
> ------------+-----------------------------------
> 1 | 2 2.70 2.70
> 2 | 8 10.81 13.51
> 3 | 29 39.19 52.70
> 4 | 18 24.32 77.03
> 5 | 11 14.86 91.89
> . | 4 5.41 97.30
> .a | 1 1.35 98.65
> .b | 1 1.35 100.00
> ------------+-----------------------------------
> Total | 74 100.00
>
> . count if rep78 == .
> 4
>
> . count if !(rep78<.)
> 6
>
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