For information about data considerations, examples, and interpretation, go to Overview for Heatmap.
Categorical row variables
Enter up to five columns where the categories are represented as rows on the heatmap.
Categorical column variables
Enter up to five columns where the categories are represented as columns on the heatmap.
Summarized variables (optional)
Enter a numeric or text column that defines the color gradient of the rectangles in the heatmap. If you enter multiple columns, Minitab generates a separate heatmap for each variable that you enter.
Function
From Function, select the function of the Summarized variables. For example, if you select Maximum, Minitab defines the color gradient for the heatmap based on the maximum value of the summarized variables in each rectangle. If you enter a text column in Summarized variables, you can only select Percent equal to specified values, Number of nonmissing values, or Number of missing values.
- Percentile
- If you select Percentile, you must enter a value in Percentile value. The value must be between 0 and 100. Minitab uses the value you enter to define the color gradient in the heatmap. For example, if you enter 50, Minitab uses the 50th percentile to define the color gradient for each rectangle of the heatmap.
- Percent between two values
- If you select Percent between two values, you must enter numeric values in First value and Second value. The value you enter for First value must be less than or equal to the value you enter for Second value. Minitab defines the color gradient for the heatmap based on the percentage of observations that is between the two values.
- Percent equal to specified values
- If you select Percent equal to specified values, you must enter one or more values in Values. The values must be the same type of data as the column you entered in Summarized variables. Minitab defines the color gradient for the heatmap based on the percentage of observations that is equal to the values that you enter.
By variables
- Show all combinations
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When you enter multiple By variables, Minitab enables the Show all combinations checkbox. Select this option to create a separate heatmap for each combination of groups created by the By variables. If you do not select this option, Minitab creates a plot for each group of each By variable.
For example, the first By variable has two groups, Male and Female, and the second By variable has two groups, Employed and Unemployed. If you select Show all combinations, Minitab creates four separate plots for the combinations of Male/Employed, Male/Unemployed, Female/Employed, and Female/Unemployed. If you do not select Show all combinations, Minitab creates four separate plots for Male, Female, Employed, and Unemployed.
Gradient type
- Diverging
- Rectangles with high values are red, and rectangles with low values are blue. In Gradient symmetric around value, enter a value to center the gradient scale at a specific value rather than the center of the function that you selected.
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- Sequential from low to high
- Rectangles with high values are dark blue, and rectangles with low
values are light blue and light gray. You can use this option to highlight
rectangles with more productivity or to maximize revenue.
- Sequential from high to low
- Rectangles with low values are dark blue, and rectangles with high
values are light blue and light gray. You can use this option to highlight
rectangles with low defect rates or to minimize cost.
Same gradient scale
When you enter multiple columns in Summarized variables, select this option to use the same gradient scale for each heatmap created for the different columns.
