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Re: st: New package -missingplot- on SSC


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: New package -missingplot- on SSC
Date   Tue, 6 Nov 2012 14:43:09 +0000

I should perhaps have added: if interested, install by

. ssc inst missingplot

Any users of Stata 8 and 9 should rename missingplot.sthlp to missingplot.hlp.

Nick

On Tue, Nov 6, 2012 at 1:01 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> Thanks as usual to Kit Baum, a new package -missingplot- has been
> added to SSC. Stata 8.2 is required.
>
> -missingplot- gives a plot showing the incidence of missing values in
> one or more variables in the current dataset.
> The horizontal axis shows observation numbers; the vertical axis shows
> one or more lines, one for each variable
> shown. Marker symbols show which values are missing. -missingplot-
> treats numeric and string variables alike: what is common to both is
> whether the -missing()- function returns true.
>
> -missingplot- may be useful for seeing broad patterns in the incidence
> of missing values, for example blocks of
> observations with many or all missing values or variables with many or
> all missing values.  It may also be useful
> for quickly identifying fine structure or notable detail in some instances.
>
> The idea of -mssingplot- is very simple. The real issue is whether
> users find structure in the incidence of missing values more easily
> than they would do otherwise, or whether they ever find structure that
> they would have missed otherwise.
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