Calculating aggregates for non-linear functions is not easy. For example, it's not obvious which combinations of temperature and humidity will result in the lowest wet bulb temperature for the day. It can be done by taking partial derivates of temperature and humidity, setting to zero, then solving for T and R.
Easier to put it in the database. On Thu, Dec 17, 2020 at 12:14 PM [email protected] <[email protected]> wrote: > No, i just adjustet the vaporpressure.py example. > > But i see what you mean, i have to calculate it by my own, this means i > have to load all data for a day and calculate it. > im not shure i can do this. > i quess its easyer and better to do this in the database. > > gjr80 schrieb am Donnerstag, 17. Dezember 2020 um 20:37:57 UTC+1: > >> Hi, >> >> When you wrote your xtype extension what methods did you implement? Did >> you implement get_aggregate()? >> >> Gary >> >> On Friday, 18 December 2020 at 02:41:34 UTC+10 [email protected] wrote: >> >>> Hi >>> i made a xtype extension for a wetbulp temperaur. this worsks fine with >>> the $current tag and the image generator. >>> >>> with tag $day.wetbulp_t.min the chetagenerator rise no error but >>> whrites $day.wetbulp_t.min in the file... >>> >>> do i have do add wetbulp_t in database for get this to work? >>> >> -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/weewx-user/c9c7b1eb-6979-4c74-b8d9-36522dc99a49n%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-user/c9c7b1eb-6979-4c74-b8d9-36522dc99a49n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/CAPq0zECuYSeF6uuw0ySJs5VQ3iHw7%3DVgKES-Ub5Y62ZCkq107A%40mail.gmail.com.
