Download the latest script from
https://github.com/morrowwm/weewx_tonga_browse. Beside installing the
Python Modules Vince stated above, I needed to also install python3-scipy. I
do have data between 1642172400 and 1642693629; except for a couple "null"
in that time period. So when I run the script, I get the following error.
raspberrypi:~/Desktop/Tonga $ python3 tonga_barometer.py
distance to eruption 13293.9 km arrival at 1642261629 (2022-01-15 10:47:08)
select datetime, barometer from archive where datetime > 1642172400 and
datetime < 1642693629 order by dateTime;
Traceback (most recent call last):
File "tonga_barometer.py", line 47, in <module>
coeff = np.polyfit(xdata, ydata, 2)
File "/usr/lib/python3/dist-packages/numpy/lib/polynomial.py", line 590,
in polyfit
y = NX.asarray(y) + 0.0
TypeError: unsupported operand type(s) for +: 'NoneType' and 'float'
There should be a way to check for "null" data within the time period.
On Thursday, January 20, 2022 at 8:12:55 PM UTC-5 Cameron D wrote:
> yes, definitely looks like there is no data.
> I have attached another version of mine, in which the trend line is
> disabled by default, but I suspect that would just delay the inevitable and
> it would crash trying to do the plot.
>
> I also fixed up a few plotting errors in my code to do with the mysteries
> (to me) of layer ordering.
> I also had a background bar showing either side of expected arrival - in
> this version I have now changed that to start at the expected arrival and
> stop 1 hour later.
>
> On Friday, 21 January 2022 at 3:29:36 am UTC+10 [email protected] wrote:
>
>> Hello,
>> Not being a programmer, I probably shouldn't have messed with this, but
>> being curious...
>>
>> I tried the code posted on github as well as the one by Cameron D. In
>> both cases I got the following error:
>> ```
>> root@n4mrv:/home/bg/weewx_tonga_browse-main# python3 ./tonga.py [file
>> from Cameron D]
>>
>> distance to eruption 12056.6 km arrival at 1642258360 (2022-01-15
>> 09:52:39)
>> opposite pulse arrival at 1642308921 (2022-01-15 23:55:21)
>> second time around pulse arrival at 1642385471 (2022-01-16 21:11:10)
>> Traceback (most recent call last):
>> File "./tonga.py", line 178, in <module>
>> plot_burst( cursor, arrival_time, hour_span, "primary" )
>> File "./tonga.py", line 54, in plot_burst
>> coeff = np.polyfit(xdata, ydata, background_order )
>> File "<__array_function__ internals>", line 180, in polyfit
>> File "/usr/local/lib/python3.8/dist-packages/numpy/lib/polynomial.py",
>> line 638, in polyfit
>> raise TypeError("expected non-empty vector for x")
>> TypeError: expected non-empty vector for x
>> ```
>> I added my lat/lon information but may have missed something else I need
>> to change. Python modules were installed as directed. Copy of weewx.sdb is
>> in the same directory as the program.
>> Thanks.
>> Bob
>> On Wednesday, January 19, 2022 at 10:32:49 AM UTC-5 [email protected]
>> wrote:
>>
>>> On Wednesday, January 19, 2022 at 12:42:04 a.m. UTC-4 Cameron D wrote:
>>>
>>>>
>>>> - as you get closer to the equator, tidal changes dominate the
>>>> baseline in that timescale - I tried higher order polynomials, but they
>>>> are
>>>> next to useless.
>>>>
>>>> I also had little luck with higher order polynomials to remove the
>>> general trend.
>>>
>>> I've put the script here: https://github.com/morrowwm/weewx_tonga_browse
>>>
>>
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