Rich,
As you suggested, I added the additional MQTTSubscribe code to my
weewx.conf file and it seems to be filling in the gaps. Thanks for clearing
this up for me.
[[[lht65b]]] #105a inside temp
ignore = false # opt in for this field
name = extraTemp2
expires_after = None # cache never expires
contains_total = false
conversion_type = float
[[[[message]]]]
type = individual
Gary, I "sort of" understand the line_gap_fraction--thanks for the details.
Since mine was set to 0.05 (weewx.conf 5.1), I'm not sure what might be
overiding this value. I guess it's possible that some other format setting
is affecting it. I've looked at skin.conf and weewx.conf but nothing at
least directly mentions the line_gap_fraction.
Everyone's help here has been greatly appreciated.
Cheers,
Bob
On Saturday, July 20, 2024 at 10:28:51 AM UTC-4 [email protected] wrote:
> Gary,
> Thanks for the very clear explanation. I guess I was a bit lazy. After
> reading your post I found the documentation for it here,
> http://www.weewx.com/docs/5.1/reference/skin-options/imagegenerator/#line_gap_fraction
> Also, digging into the code seems to confirm that null/None values will
> always cause a break. See,
> https://github.com/weewx/weewx/blob/95210c4e6008b67c14220157e4a7934c1e03bd42/src/weeplot/utilities.py#L472
> - rich
>
> On Friday 19 July 2024 at 20:49:55 UTC-4 gjr80 wrote:
>
>> On Saturday 20 July 2024 at 07:42:39 UTC+10 [email protected] wrote:
>>
>> I don’t fully understand the `line_gap_fraction` option. But I seem to
>> remember that `None` values will always cause a break in the plot…
>>
>>
>> line_gap_fraction does seem a little mystical in operation but once you
>> understand how it works it is fairly easy to use. Think of
>> line_gap_fraction as the proportion of the overall x-axis timeframe that
>> the plot engine considers to be a gap in data. So for a typical day plot
>> (27 hours or 97200 seconds) a line_gap_fraction of 0.05 means that any
>> gap in time between successive plot points of 4860 seconds (81 minutes) or
>> longer will be considered a gap and result in a gap in the plotted line. If
>> line_gap_fraction
>> = 0.01 the gap drops to 16.2 minutes. So for data with a 15 minute
>> archive period a line_gap_fraction = 0.01 will plot a continuous line
>> provided there are no missing points. Any missing points result in a gap of
>> at least 30 minutes so line_gap_fraction = 0.01 will result in gaps. In
>> this case a line_gap_fraction = 0.02 or greater is required. The default
>> line_gap_fraction
>> = 0.05 should work fine. If it is not then something else is amiss
>> (first thing that springs to mind is the possibility that
>> line_gap_fraction is being overridden somewhere in the respective
>> skin.conf or weewx.conf).
>>
>> The same applies for week, month and year plots, but you now apply
>> line_gap_fraction to a much longer overall x-axis timeframe meaning the
>> gap in seconds for a given line_gap_fraction value is greater . Also,
>> week, month and year plots by default plot an aggregate so the data points
>> are now spaced every 'aggregate interval' seconds and not necessarily every
>> 'archive period' seconds.
>>
>> Also, when line_gap_fraction is omitted (or set to a value <0 or >1) any
>> missing data points will be considered a gap and plotted as such. In this
>> case you definitely do not want to omit line_gap_fraction or you will
>> always have gaps.
>>
>> Gary
>>
>
--
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/66b552fc-e8b6-46fa-a789-7b384efab956n%40googlegroups.com.
