OK. This is perfectly logical and acceptable limitation. It makes sense for 
both weekly and monthly or longer period where it will be used.

I am off investigating how to set such defined spans.

Thanks for the insight.


Na 8. listopada 2019. 02:43:36 CEST, Thomas Keffer <tkef...@gmail.com> wrote:
>There is indeed a "minmax" aggregate, but it comes with limitations.
>The
>start and end of the aggregation interval must be at midnight. I
>suspect
>the problem is that you are attempting to do it from a random time of
>the
>day. In that case, minmax (and maxmin) would then be not well-defined
>mathematically.
>
>-tk
>
>On Mon, Oct 7, 2019 at 11:11 AM Pila <mrzimgj...@gmail.com> wrote:
>
>> They are not nearly the same thing. In the summer, we do not care
>about
>> the coldest night. Warmest nights are the problem. Warmest nights are
>of
>> interest. In the winter lowest daily maximum becomes crucial.
>>
>> Pity. This is very unfortunate missing crucial feature. These two
>really
>> should exist in any good meteo program.
>>
>> Then again, why they exist in standard form which is useless to
>describe
>> graphs?
>>
>>
>> Na 7. listopada 2019. 19:36:52 CEST, Andrew Milner <
>> andrew.s.r.mil...@gmail.com> wrote:
>>>
>>> there is no aggregate minmax or maxmin - just saying min will give
>the
>>> lowest value over the span and just saying max will give the highest
>value
>>> over the period
>>>
>>> so
>>>
>>> minmax: $span(day_delta=7).outTemp.minmax<br/>
>>> maxmin: $span(day_delta=7).outTemp.maxmin<br/>
>>>
>>> should be
>>>
>>> minmax: $span(day_delta=7).outTemp.min<br/>
>>> maxmin: $span(day_delta=7).outTemp.max<br/>
>>>
>>> On Monday, 7 October 2019 20:21:09 UTC+3, Pila wrote:
>>>>
>>>> Sorry, I was making notes on everything I wanted to ask, and in all
>that
>>>> logging, I forgot a log I should include :)
>>>>
>>>> wee_reports[14046]: cheetahgenerator: Generate failed with
>exception '<class
>>>> 'weewx.ViolatedPrecondition'>'
>>>> wee_reports[14046]: cheetahgenerator: **** Ignoring template
>/home/weewx
>>>> /skins/Smartphone/temp.html.tmpl
>>>> wee_reports[14046]: cheetahgenerator: **** Reason: Invalid
>aggregation
>>>> type 'minmax'
>>>> wee_reports[14046]: ****  Traceback (most recent call last):
>>>> wee_reports[14046]: ****    File
>>>> "/home/weewx/bin/weewx/cheetahgenerator.py", line 332, in generate
>>>> wee_reports[14046]: ****      fd.write(str(compiled_template))
>>>> wee_reports[14046]: ****    File
>>>> "/usr/lib/python2.7/dist-packages/Cheetah/Template.py", line 1045,
>in
>>>> __str__
>>>> wee_reports[14046]: ****      rc = getattr(self, mainMethName)()
>>>> wee_reports[14046]: ****    File
>>>> "_home_weewx_skins_Smartphone_temp_html_tmpl.py", line 151, in
>respond
>>>> wee_reports[14046]: ****    File "/home/weewx/bin/weewx/tags.py",
>line
>>>> 329, in __getattr__
>>>> wee_reports[14046]: ****      return self._do_query(aggregate_type)
>>>> wee_reports[14046]: ****    File "/home/weewx/bin/weewx/tags.py",
>line
>>>> 343, in _do_query
>>>> wee_reports[14046]: ****      val=val, **self.option_dict)
>>>> wee_reports[14046]: ****    File
>"/home/weewx/bin/weewx/wxmanager.py",
>>>> line 60, in getAggregate
>>>> wee_reports[14046]: ****      return
>weewx.manager.DaySummaryManager.
>>>> getAggregate(self, timespan, obs_type, aggregateType,
>**option_dict)
>>>> wee_reports[14046]: ****    File
>"/home/weewx/bin/weewx/manager.py",
>>>> line 1268, in getAggregate
>>>> wee_reports[14046]: ****      **option_dict)
>>>> wee_reports[14046]: ****    File
>"/home/weewx/bin/weewx/manager.py",
>>>> line 450, in getAggregate
>>>> wee_reports[14046]: ****      raise
>weewx.ViolatedPrecondition("Invalid
>>>> aggregation type '%s'" % aggregate_type)
>>>> wee_reports[14046]: ****  ViolatedPrecondition: Invalid aggregation
>>>> type 'minmax'
>>>>
>>>>
>>>>
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