Launch the Treemap platform by selecting Graph > Treemap.
If you want the size of the rectangles to correspond to the levels of a variable, specify a Sizes variable. The rectangle size is proportional to the sum of the Sizes variable across all of the rows corresponding to a category. If you do not specify a Sizes variable, the rectangle size is proportional to the number of rows for each category.
The only required variable role for the Treemap platform is Categories. If you specify only a Categories variable and no other variables, the rectangles in the treemap have these attributes:
If you specify two Categories variables, the treemap is grouped by the first variable, and sorts within groups by the second variable. For example, using the Cities.jmp sample data table, specify Region and city (in that order) as the Categories variables.
By default, the rectangles in a treemap appear in alphabetical order. Values progress from the top left to the lower right. To change this ordering, specify an Ordering variable. When an Ordering variable is specified, the rectangles appear with the values progressing from the bottom left to the upper right.
If you specify a single Ordering variable, the rectangles are clustered, with the high levels or large values together, and the low levels or small values together.
If you specify two Ordering variables, the treemap arranges the rectangles horizontally by the first ordering variable, and vertically by the second ordering variable. This approach can be useful for geographic data.
If you specify a Coloring variable, the colors of the rectangles correspond to the levels of the variable.
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If the variable is continuous, the colors are based on a continuous color theme setting. The default color theme is Blue to Gray to Red. The color of each value is based on the average value of all of the rows. Blue represents the lowest values, and red represents the highest values. The color is most intense at the extremes of the variable, and paler colors correspond to levels that are close to the mean. For example, see The Treemap Window.
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Note: If you have used the Value Colors column property to color a column, that property determines the colors of the categories.
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If you do not specify a Coloring variable, colors are chosen from a rotating color palette.
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