Very helpful! many thanks
On Fri, Sep 4, 2009 at 9:44 AM, Maarten buis<[email protected]> wrote:
> --- Maarten buis wrote:
>> > An intermediate solution that will get the small graph
>> > while keeping the data intact is:
>> >
>> > . bys yearofbirth (wage): gen byte first = _n == 1
>> > . egen meanwage = mean(wage), by(yearofbirth)
>> > . scatter meanwage yearofbirth if first
>
> --- Nick Cox wrote:
>> Maarten's solution is good, but there is no need for the
>> sorting within -yearofbirth-
>
> This is correct. My solution came directly from my default
> library of tricks. In a general case this will make sure
> that first will tag an observation that has a valid
> (non-missing) value on whatever I am sorting on, in this
> case wage, unless all values of wage are missing within a
> category of yearofbirth. This is not relevant in this
> case as meanwage will always contain valid values.
>
> -- Maarten
>
> --------------------------
> Maarten L. Buis
> Institut fuer Soziologie
> Universitaet Tuebingen
> Wilhelmstrasse 36
> 72074 Tuebingen
> Germany
>
> http://www.maartenbuis.nl
> --------------------------
>
>
>
>
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