Cloudera Docs

Using the trellis option with independent scale

Cloudera Data Visualization enables you to create a new trellised Areas visual with independent aggregate axes.

  • Create the World Population - Area visual as described in Areas.
  • Create the World Population - Area Trellis as described in Enabling the trellis option.

Trellis charts are very powerful visualization tools. However, they do not work well when one chart contains values that are several orders of magnitude larger than in the other charts. The charts that represent segments with smaller values are very difficult to interpret. You can mitigate this problem by enabling independent axis.

This example uses the visual World Population - Area Trellis from Enabling the trellis option, to create trellis charts with independent scale.

The following steps show you how to create a new trellised area chart with independent aggregate axes on the World Life Expectancy dataset.

  1. Open the World Population - Area Trellis visual in Edit mode.
  2. Clone the visual as described in Cloning a visual.

    While the chart for Asia shows clear growth, the one of Oceania does not show any color. This is because by default, trellis charts are generated to the same scale. You should set Oceania to its own scale to be visible.

    Cloudera Data Visualization provides an override to this default setting. You have an option to set the trellis charts to their own axes by customizing the axes, and selecting Independent Aggregate Scale option, as described in Customizing axes.

  3. Click REFRESH VISUAL.

    The updated trellised area chart appears.

  4. Click the (pencil) icon next to the title of the visualization to edit it, and change the title to World Population - Area Trellis, Independent Axes.
  5. At the top left corner of the Dashboard Designer, click SAVE.