It's certainly possible to do, but only by writing a search list extension.
The reason is technical. A tag like $week.wind.gustdir actually uses the *daily summaries*, a set of precompiled statistics, stored in some database tables. One of the statistics is gustdir, the direction of the max wind speed. Queries involving daily summaries must be on the day boundaries: midnight-to-midnight, like $day, $week, $month, etc. By contrast, because $span can be across an arbitrary time span, it uses the *archive database*, a big flat table that stores the archive data. It does not include gustdir --- instead, that must be calculated using an SQL query. The omission in the latter is purely because we haven't gotten around to it. One could imagine something like $span.wind.gustdir, but it just hasn't been implemented. Sorry. -tk On Sat, Feb 18, 2017 at 7:10 AM, Andreas <andreask...@gmail.com> wrote: > Is my idea really so unusual? So, nobody has a suggestion how to deal with > it? > > Andreas > > > -- > You received this message because you are subscribed to the Google Groups > "weewx-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to weewx-user+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
