Basic Bubble chart in Tableau
Use packed bubble charts to display data in a cluster of circles. In Tableau the default chart type is bar chart, when there is a dimension on the Columns shelf and a measure on the Rows shelf. Click Show Me on the toolbar, then select the packed bubbles chart type.
Different bubble sizes are useful to visually emphasize specific values
Bubble charts are visualizations where the size and optionally the colour of the bubbles are used to visualize the data.
