What is trellising and how to use trellis charts?

A powerful extension to single bars and line charts, trellising is rendering the same chart in small multiples. This plots the same chart for discrete values of an additional dimension of the dataset.

Here’s an example of trellising bar chart. We stack two dimensions in the X-shelf, which leads to the trellising effect. The top dimension (Quarter) creates one small bar chart per quarter (Q1, Q2, etc). The second dimension (Province) serves as the x-axis bar dimension.

To avoid showing borders there’s a setting to hide borders under Settings -> Trellis as shown on the right panel.

One benefit of trellising is that it allows you share common x-axis across all the separate small charts. In our example, the province “Nunavut” always appears even if there’s no data for that particular quarter.

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