Max/Min not found on plot

07142019, 04:46 PM
Post: #1




Max/Min not found on plot
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?)?


07142019, 06:57 PM
Post: #2




RE: Max/Min not found on plot  
07142019, 07:19 PM
Post: #3




RE: Max/Min not found on plot
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?


07142019, 07:22 PM
Post: #4




RE: Max/Min not found on plot
I am using the default epsilon of 1e12, have it on exact, tried 1e14, non exact, same lack of extremum. Aug 2018 version on G2, July 2018 on version A.


07142019, 07:28 PM
Post: #5




RE: Max/Min not found on plot  
07142019, 07:33 PM
Post: #6




RE: Max/Min not found on plot
Same as me...on plot, my setting is adaptive...


07152019, 11:03 AM
Post: #7




RE: Max/Min not found on plot
My plot method is also set to adaptive.
road 

01052022, 02:14 AM
(This post was last modified: 01052022 02:16 AM by jte.)
Post: #8




RE: Max/Min not found on plot
The plotting method does not affect extrema (or root) finding.


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