This changes the color palette on your chart. Since our chart has a light background, we picked a "Light" palette. The names of the color palettes indicate whether they're designed for use on charts with dark or light backgrounds. Select Color from the Marks card and select Density Multi-color Light from the menu. Tableau selected a blue color palette by default, but you can choose from ten density color palettes or any of the existing color palettes. The more overlapping data points, the more intense the color is. Tableau created a density chart by overlaying marks, called kernels, and color-coding where those kernels overlap. On the Marks card, select Density from the menu to change this scatter plot into a density chart. We've created a basic scatter plot, but there are lots of overlapping marks in the view and it's hard to see where the marks are most dense. If you hover over a mark, you can see the country name, female life expectancy, and infant mortality rate. The number of marks in your view is now equal to the number of distinct countries in this data set. Now there are many more marks in your view. Right click on both of these measures and to change Measure(Sum) to Average.ĭrag the Country dimension to Details on the Marks card. Tableau aggregates the measure as a sum and creates a horizontal axis.ĭrag the Life Expectancy Female to the Rows shelf.īoth Infant Mortality and Life Expectancy are listed as a Sum, rather than average. Open the World Indicators data source from the Saved Data Sources section of the Start screen.įrom the Health folder, drag Infant Mortality to the Columns shelf.To use a density chart to see orders by date, follow these steps: To show how density charts can help make sense of overlapping marks in Tableau, we‘re going to start with a scatter plot with a large number of marks and re-create it as a density chart. By default, Tableau will use the automatic mark type. The basic building blocks for a density chart are as follows:Īt least one continuous measure, and at least one measure or dimensionĭensity charts use the Density mark type. Note: Density charts work best when used with data sources containing many data points. In Tableau, you can create a chart using the density mark by placing at least one continuous measure on the Columns shelf, and at least one dimension or measure on the Rows shelf (or vice versa), and then adding a field to the Marks card. Tableau does this by grouping overlaying marks, and color-coding them based on the number of marks in the group.ĭensity maps help you identify locations with greater or fewer numbers of data points. Use density chart to visualize patterns or trends in dense data with many overlapping marks.
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