Heat map workbook for display of half-hourly data

A 'heat-map' chart is a powerful visualisation technique that can easily show ten weeks' half-hourly data in a single screen. In the chart each vertical slice is one day, running midnight to midnight top to bottom, with each half-hourly cell colour-coded according to demand to create a contour-map effect.

This for example is the pattern of a building's gas consumption.

When you look at this example, you can see numerous features:

Download free heatmap display tool