TIBCO Cloud™ Spotfire® User Guide

Adding a dendrogram to a heat map

A dendrogram is a tree-structured graph used in heat maps to visualize the result of a clustering calculation.

About this task

See Dendrograms and clustering for general information about dendrograms in the heat map, and Hierarchical clustering for information about the clustering tool.

Before you begin

Adding dendrograms to heatmaps can only be done in the installed client.

Procedure

  1. In the installed client, right-click the heat map visualization to show the pop-up menu.
  2. Select Properties.
  3. Go to the Dendrograms page.
  4. Select dendrogram type in the Settings for drop-down list.
  5. Select Show row dendrogram or Show column dendrogram depending on the dendrogram type you selected in the previous step.
    The settings for the selected dendrogram become available in the lower part of the dialog.
  6. Click Calculated hierarchical clustering.
    To use an already existing dendrogram instead, click Imported, select which dendrogram to use from the data table selector, and continue to step 12.
  7. Click Settings.
  8. Select the Clustering method, Distance measure, and Ordering weight from the drop-down lists.
  9. Select how to replace empty values from the Empty value replacement method drop-down list.
    You can read more about the different methods in Performing clustering with the hierarchical clustering tool.
  10. If you want to normalize the values in the heat map, select a Normalization method from the drop-down list.
    To learn more about normalization methods, see Normalizing columns.
  11. When done, click OK to close the dialog.
  12. For the dendrogram to show the correct clustering data, you must update it. Click the Automatically radio button if you want updates to appear automatically every time a setting is changed. If you want to control when the dendrogram is updated, click the Manually radio button, and then the Update button.

Results

The dendrogram is shown in the visualization.