Tornado
Use a tornado visualization to compare two categories of a data series.
A tornado visualization has similar functionality to that of a stacked bar visualization. However, the two category bars point in opposite directions and share a common zero value in the center of the value axis.
The following image shows an example of a tornado visualization.
To re-create this tornado visualization, perform the following steps:
- From a dashboard, click the Visualization icon
, and in the System tab of the
Visualizations pane, select Tornado. - Click the Sources icon
, click the Select a source button, and in the
Select a source window, go to Samples > By
industry > Healthcare > Data, and open the
Hospital admissions data module. - Drag the following data sets onto the indicated fields:
- Hospitals onto the Categories field
- Admissions onto the Value field
- Gender onto the Split categories and Color fields.
Limitations
If you put into the Split categories field a categorical data column that contains more than two categories, the tornado visualization displays only the first two of them.
Bars of data sets with negative values are not displayed in tornado visualizations.