Generally, you want PlotPoints to be high enough that every peak or valley in the plot has at least one sampling point. $I$ is marked "OK," it does not seem to ever be reconsidered for active subdivision, even if an adjacent interval is subdivided to the point that the angle formed with Also, it appears that in the recursive subdivision process, the intervals defined by the sample points are separated into two classes, those that have satisfied the control value and those under active recursive subdivision. My own investigations show that it is not that simple, in that recursive subdivision sometimes continues past the limit defined by the control value rad. This is done up to the MaxRecursion setting mr times. The intervals about a sampling point are subdivided (in two) if the two adjacent line segments deviate from forming a straight line by an angle of more than the control value rad (in radians). PlotPoints -> npts determines the initial number npts of sampling points. MaxRecursion -> mr (* default is 6 for Plot max is 15 *) The sampling of Plot is controlled by three option settings PlotPoints -> npts Finance, Statistics & Business Analysis.Wolfram Knowledgebase Curated computable knowledge powering Wolfram|Alpha. Wolfram Universal Deployment System Instant deployment across cloud, desktop, mobile, and more. Wolfram Data Framework Semantic framework for real-world data.
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