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by geraldmw
Tue Oct 03, 2017 6:35 pm
Forum: Ask Chevrolet
Topic: Erroneous Average (simple math) in Efficiency History
Replies: 18
Views: 9329

Re: Erroneous Average (simple math) in Efficiency History

Driving the Grapevine or going down the hill in RPV? I've only had this happen to me once and it was a steep extended downhill on Crenshaw from RPV to Harbor City. The issue is not the actual bars on the graph .. it is the calculation of the height to place the "red line." The high miles ...
by geraldmw
Tue Aug 22, 2017 11:37 pm
Forum: Ask Chevrolet
Topic: Erroneous Average (simple math) in Efficiency History
Replies: 18
Views: 9329

Re: Erroneous Average (simple math) in Efficiency History

So apparently, 252 mi/kWh is the maximum efficiency that the bar graph will record. Over that, it goes to zero. I'm guessing the actual limit is 400 km/kWh. The question is how did this person get it to go exactly to 252 and not over. I am "this person" --- The 252 mi/kWh is what happen o...
by geraldmw
Tue Aug 22, 2017 11:32 pm
Forum: Ask Chevrolet
Topic: Erroneous Average (simple math) in Efficiency History
Replies: 18
Views: 9329

Re: Erroneous Average (simple math) in Efficiency History

I have most recent version of the software (vrs 13.4.0) as of 5 minutes ago. I believe the issue still exists! Would be great if Chevy behaved like a real company and issued release notes with software upgrades (and made it possible to see a release history!) I guess they are a car company at heart....
by geraldmw
Thu Jun 08, 2017 4:02 pm
Forum: Ask Chevrolet
Topic: Erroneous Average (simple math) in Efficiency History
Replies: 18
Views: 9329

Re: Erroneous Average (simple math) in Efficiency History

I'm currently a software engineer (30 years now), but my college major was English. You'd be surprised how many programmers have poor or atrophied math skills. I have a red face saying this, but I could have easily made that mistake. And I've written aircraft navigation software using spherical tri...
by geraldmw
Tue Jun 06, 2017 10:04 pm
Forum: Ask Chevrolet
Topic: Erroneous Average (simple math) in Efficiency History
Replies: 18
Views: 9329

Re: Erroneous Average (simple math) in Efficiency History

I wonder if anyone from Chevy actually sees this?
by geraldmw
Sat Jun 03, 2017 3:02 pm
Forum: Ask Chevrolet
Topic: Erroneous Average (simple math) in Efficiency History
Replies: 18
Views: 9329

Erroneous Average (simple math) in Efficiency History

The graph of efficiency history is wrong. I teach 4-8th grade math and my students could pick the ERROR! The SIMPLE average of a series of averages is NOT the same as the overall average. The correct answer is a WEIGHTED average. eff1.jpg Here is the explanation: Say for each of the 5 mile ranges I ...
by geraldmw
Wed Apr 12, 2017 9:31 pm
Forum: General / Main Chevy Bolt Owners Forum
Topic: Error on "Energy Detail: Since last Full Charge" Screen
Replies: 8
Views: 3451

Re: Error on "Energy Detail: Since last Full Charge" Screen

There is a problem ... it now displays over 600kwH used and the miles travelled is STILL stuck at 1272 since last full charge. Those who say there is not a problem should do some simple math to see that there IS a problem (and yes I have driven the car to consume that energy -- the road trip meter i...
by geraldmw
Wed Mar 22, 2017 1:19 am
Forum: General / Main Chevy Bolt Owners Forum
Topic: Error on "Energy Detail: Since last Full Charge" Screen
Replies: 8
Views: 3451

Error on "Energy Detail: Since last Full Charge" Screen

On this screen (see picture attached) the distance traveled has been 'frozen' at 1272.6 miles for 400+ miles. I have attached pictures of the screen with obviously erroneous data. IMG_20170321_175856.jpg I have attached the speedometer screen too ... the trip meter shows that the data on the above i...

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