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+--- Thread: Max/Min not found on plot (/thread-13280.html)
Max/Min not found on plot - lrdheat - 07-14-2019 04:46 PM
I plotted the 2nd derivative of e^(1/4). The function plots nicely on my G2, but when querying for obvious extremums on the plot between -1 and 0, no maximum or minimum is found. This occasionally surprises me on other plots as well. Why is this (operator ignorance?)?
RE: Max/Min not found on plot - roadrunner - 07-14-2019 06:57 PM
Assuming you meant e^(1/x), it seems to work for me:
[attachment=7468]
-road
RE: Max/Min not found on plot - lrdheat - 07-14-2019 07:19 PM
Your e^(1/x) assumption was correct. I get the same graph, but it does not find the extremums. Might I have some setting that is causing this? This is not an artifact of the G2...my version A does this as well. I must have a CAS setting or home setting that needs to be changed?
RE: Max/Min not found on plot - lrdheat - 07-14-2019 07:22 PM
I am using the default epsilon of 1e-12, have it on exact, tried 1e-14, non exact, same lack of extremum. Aug 2018 version on G2, July 2018 on version A.
RE: Max/Min not found on plot - roadrunner - 07-14-2019 07:28 PM
These are the setting I was using:
[attachment=7469]
-road
RE: Max/Min not found on plot - lrdheat - 07-14-2019 07:33 PM
Same as me...on plot, my setting is adaptive...
RE: Max/Min not found on plot - roadrunner - 07-15-2019 11:03 AM
My plot method is also set to adaptive.
-road
RE: Max/Min not found on plot - jte - 01-05-2022 02:14 AM
The plotting method does not affect extrema (or root) finding.