A Heatmap color-codes values within a matrix, showing differences through variations in coloring. They are useful for visualizing differences, similarities, and trends across multiple variables..
Technical details
Chart
APPEARANCE
Row sorting or dendrogram Whether to sort rows by their averages in ascending or descending order.
Column sorting or dendrogram Whether to sort columns by their averages in ascending or descending order.
Shading standardization Whether to standardize the rows or columns to have means of zero and standard deviations of one before shading. This has no effect on the displayed cell values, only the colors.
Left columns A list of tables to be appended to the left of the heatmap, matched by row names where present.
Left column headings A comma-separated string of headings for the appended left columns. If not supplied, the column names of the tables of Left columns are used.
Right columns A list of tables to be appended to the right of the heatmap, matched by row names where present.
Right column headings A comma-separated string of headings for the appended right columns. If not supplied, the column names of the tables of Right columns are used.
Note that font family, color and sizes of left and right columns are linked to those settings for data labels and can be changed with Show data labels.
Acknowledgements
Uses the d3heatmap htmlwidget.
Method
- In Displayr: How to Create a Heatmap
- In Q: How to Create a Heatmap