+- HP Forums (https://www.hpmuseum.org/forum)
+-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html)
+--- Forum: HP Prime (/forum-5.html)
+--- Thread: Advanced Graphing app sometimes fails to find POI (/thread-17732.html)
Advanced Graphing app sometimes fails to find POI - Wes Loewer - 11-21-2021 07:35 PM
I noticed that the Advanced Graphing app fails to find extrema and inflections in the fairly basic function:
Y=e^(-X)*(X+3) or its inverse.
However, Y=2^(-X)*(X+3) and Y=3^(-X)*(X+3) work fine.
It seems to be an integer verses decimal issue as Y=2.001^(-X)*(X+3) also fails.
RE: Advanced Graphing app sometimes fails to find POI - roadrunner - 11-22-2021 06:05 PM
You may be right on that because:
Y=((419314/154257))^(-X)*(X+3)
works.
-road
RE: Advanced Graphing app sometimes fails to find POI - KlaasKuperus - 11-22-2021 08:30 PM
Thanks, Wes. We will look into this.
RE: Advanced Graphing app sometimes fails to find POI - Wes Loewer - 11-23-2021 03:18 PM
(11-22-2021 08:30 PM)KlaasKuperus Wrote: Thanks, Wes. We will look into this.
The bug seems to have been introduced early on in the firmware.
beta version 2013-11-20 (rev 5410) worked
beta version 2013-11-22 (rev 5440) fails