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Max/Min not found on plot - Printable Version

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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