Module: Co-occurrence Heatmap

Add a grid that counts how often each pair of annotation types happens together within a time window.

Before you start

• Add a module
• Co-occurrence

Steps

1. Click Add module. The drawer opens on the right.
2. Click + next to Co-occurrence Heatmap. The module lands at the foot of the page.
3. Click the settings button in its title bar. A panel opens with the slider Co-occurrence window.
4. Drag the slider to the window you want. The grid redraws at once.

Check it worked

The card says how wide the window is, such as "Annotation-pair counts within a ±2.0 s window". A darker square means a higher count.

The window starts at 2000 ms. You can set it from 500 ms to 10000 ms, in steps of 500 ms.

Two marks count as a pair when their time ranges touch after GRAPE MARS stretches each one by the window on both sides. A window of 2 seconds therefore joins marks that nearly touch, as well as marks that truly overlap.

The grid needs at least 2 types in scope. With fewer, the card says so instead.

The Excel sheet holds the same square grid, with the type names down the side and across the top.

If something goes wrong

• The heatmap or the comparison module is empty
• A module says it has no data

Related

• Module: Mode Combinations
• Co-occurrence
• Set the workspace scope