WEBVTT

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Old Faithful's 272 observations contain measurements of eruption duration
and waiting time.

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One npudens() call selects bandwidths optimized for the joint-density target
and reveals two distinct peaks: short eruptions with shorter waits,
and long eruptions with longer waits.

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The surface opens in RStudio's Viewer, where you can drag to rotate,
scroll to zoom, and resize the pane.

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Find the full script in Gallery Video Demos.