helpGPSD - Support: sr #109470, gpsprof -r cannot replay logfiles

 
 

sr #109470: gpsprof -r cannot replay logfiles

Submitted by:  None
Submitted on:  Fri 02 Mar 2018 11:16:32 PM UTC  
 
Category:  None Priority:  5 - Normal
Severity:  5 - Blocker Status:  None
Privacy:  Public Assigned to:  None
Originator Email:  -email is unavailable- Open/Closed:  Open
Operating System:  GNU/Linux

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Fri 02 Mar 2018 11:20:25 PM UTC, comment #1:

missed a bit in the original submission:

$ gpsprof -l foo.log > foo.gpt
$ gpsprof -r < foo.log

(backtrace)

Anonymous
Fri 02 Mar 2018 11:16:32 PM UTC, original submission:

Current (3.17) gpsprof is broken:

$ gpsprof > foo.gpt
correctly generates a gnuplot file with 100 samples.

$ gpsprof -l foo.log > foo.gpt
gpsprof: replotting......(0.01 sec) done.
Traceback (most recent call last):
File "/usr/bin/gpsprof", line 529, in <module>
plot.postprocess()
File "/usr/bin/gpsprof", line 206, in postprocess
self.centroid = (sum([x[0] for x in self.fixes]) / len(self.fixes),
ZeroDivisionError: division by zero

rewinding to 3.16 has a different, but also fatal breakage, in that all positions read from the logfile are recorded as 0 or nan:

plot "-" using 1:2 with points ls 3 title "101 GPS fixes" , cx(t, cep),cy(t, cep) ls 1 title "CEP (50%) = 0.000000 meters", cx(t, cep95),cy(t, cep95) title "CEP (95%) = 0.000000 meters", cx(t, cep99),cy(t, cep99) title "CEP (99%) = 0.0000

    1. meters"

# Position uncertainty, 2018-03-02T23:14:16, u-blox, 9600 8N1, cycle 1s
0.000000 0.000000 0.000000 0.000000 nan
0.000000 0.000000 0.000000 0.000000 nan
0.000000 0.000000 0.000000 0.000000 nan
0.000000 0.000000 0.000000 0.000000 nan
0.000000 0.000000 0.000000 0.000000 nan
0

The total effect is that no offline plots can be generated.

Anonymous

 

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