Contour Plot

Pro

Marching squares over a kernel estimate: rings labelled by share enclosed.

Rings areSmoothing

How far people got

3,000 visits to one article, scroll depth against time

204060805010015020090%75%25%seconds on pagescroll depth %
3,000 pointsrings hold a share of the observations90%75%50%25%

Two populations: a bounce cluster in the first seconds at almost no depth, and a read-through cluster near the end of the article after three minutes. Arrow keys move between contour levels from the outside in, Escape clears the selection. Every level follows as a table.

Scroll depth against time on page for 3,000 visits, as density contours
ContourRingsDensity
90%3360
75%21,333
50%22,345
25%15,859

Each ring is labelled with the share of visits inside it, solved from the observations rather than from the estimate's own mass. A ring holding half the smoothed density holds about two thirds of the points, so labelling that one 50% would be a false statement about the data. Smoothing is the other decision: tighten it and the sparse middle breaks into islands, loosen it and the two populations merge into one.

This component installs from the private registry, which opens with Pro. The command and the one-time setup are shown here once your licence key is in this browser.

6 sections, and every other premium component

The preview above is the real Contour Plot, running. One purchase opens the sections above on this page and on every other component in the library.