Heatmap (Labs)

A Heatmap visualization node. The view can be accessed either via the “interactive view” action on the executed node or on KNIME WebPortal.
In the node configuration, you can choose the columns to use for horizontal and vertical dimensions and enable certain controls, which are then available in the view. This includes the ability to choose different aggregation methods and the column with the data to color map or the possibility to set a title. The configuration also offers a preview of the view, which should help to get the Heatmap fast in the desired shape.
Note, this node is currently under development. Future versions of the node might have improved or changed functionality. Interactivity between multiple views is currently only possible with views also coming from this labs extension.

Options

Horizontal dimension

Select the column that contains the horizontal values. Note: Missing values are treated as separate value.

Vertical dimension

Select the column that contains the vertical values. Note: Missing values are treated as separate value.

Aggregation

Select the aggregation method used on the selected value column. If “None” is selected execution fails if the horizontal dimension contains duplicate values. If “Occurrence Count” is selected, the occurrence of the unique pairs of values of the selected horizontal and vertical column is determined.

Value dimension

Select the column that contains the values.

Title

The title of the chart shown above the generated image. If left blank, no title will be shown.

Horizontal axis label

The label for the horizontal axis. If left blank, no label will be shown.

Vertical axis label

The label for the vertical axis. If left blank, no label will be shown.

Show value labels

When checked, value labels will be shown for pieces of the heatmap.

Display colormap axis

When checked, the colormap axis is shown.

Colormap label

The label for the colormap. If left blank, no label will be shown.

Enable image download

When checked, an image of the chart can be downloaded by clicking the image download button in the view.

Show tooltip

When checked, hovering over a pie chart segment will show information about the data.

Publish Selection

When checked, the view notifies other interactive views when the user changes the selection in the current view.

Subscribe to Selection

When checked, the view reacts on notifications from other interactive views that the selection has been changed.

Enable animation

When checked, the animation of the graph is active.

Views

Heatmap (Labs)

A heatmap visualization of the input data.

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