-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Mon, 22 Jun 2020 18:39:28 -0700 Tom Keffer <tkef...@gmail.com> wrote:
> First, "growing degree days > <http://www.weewx.com/docs/customizing.htm#[[DegreeDays]]>" is now a > first-class type, analogous to heating- and cooling-degree days. Thanks for your reply. Yes, but it's more than analogous; it's the identical code to cooling-degree days. This is the max-min calculation used in crop science. What I refer to as growing-degree-days is a wide family of insect-development models. These depend on temperature but, like max-min, are non-linear at the threshold. Whether they become independent of temperature above the cutoff or actually decline is up to the modeler's interpretation of the behavior of his favorite insect (sub)species, and he has various mathematical techniques with which to work his will. I hope to be able to provide *python* functions for growing-degree-days on daily max/min temps, threshold, and cutoff that will exhaust the research literature. Here is why I regard growing-degree-days models superior to max-min. For me in Sheboygan: The growing degree-days (GDD) calculated by Baskerville and Emin's single sine horizontal cutoff method outruns the conventional degree-days (DD) calculated by the max-min method by about a week. o http://lacusveris.com/cydia/models.shtml#x83 > Second, see issue #341 <https://github.com/weewx/weewx/issues/341>, > which discusses support for generating JSON series using the Cheetah > generator. The intention was to use these series to drive things like > Highchart plots. Nothing much has happened to the issue recently > (it's nearly 2 years old), but perhaps this is what you had in mind? Yes, *json* or *csv*-formatted strings (wrapped to sensible margin widths, of course) would be nifty. This would make *html*-embedded *javascript* code very terse. I'm under the impression the absence of the patch is not a stopper because I've been generating *.csv files from *cheetah* all along ... with *for* loops, of course. I'm also under the impression that *cheetah* can generate *python* code from a template. I'd hope to keep all the specs for an image or a suite of images together in one *python* module including the data, cutoff dates, curve names, colors, axis labels, titles, etc, etc, etc. It's not something you'd do with a compiled language, but interpreted languages almost beg to be abused in this way. I haven't tried any of this, yet. I reserve the right to change my mind. - -- .. Be Seeing You, .. Chuck Rhode, Sheboygan, WI, USA .. Weather: http://LacusVeris.com/WX .. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAl7yPqAACgkQYNv8YqSjllLjDgCdHq+dKB0k8gLDjZU5dMJHaJlF dKQAni3fbSe33utKBToZ6ojJtFA6xcmd =iQZf -----END PGP SIGNATURE----- -- 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. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/20200623124048.5f5ff7e9%40quixote.LacusVeris.com.
