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Rule Viewer

KNIME Rule Viewer Node version 3.6.0.v201805031004 by Otto-von-Guericke-University Magdeburg, Germany

This node visualizes a set of rules that are represented as a table as it is the case with the Association Rule Learner. The items used to form the antecedent and consequent of the rule are considered boolean attributes (with the value 'present' if they occur in the rule). For every rule a circular icon in drawn. The outer border is subdivided into as many segments as there are items occurring in all the rules of the rule set. If the item is present in the antecedent, the corresponding segment is colored in green. The interior consists of a pie chart encoding the confidence of the rule. The color of the pie segment encodes the item of the rule consequent which may be determined by a Color Handler node. The x- and y-locations of a rule icon are determined by the recall and lift, respectively while the support is represented by the area of the icon.

Hiliting

Right-clicking a rule shows a popup menu which allows for hilighting options.

Tooltip

Move the mouse over the rule icons to get the exact values for the confidence, support and lift as well as the represented rule if plain text.

Options

Support
Select a numeric column holding the support value.
Confidence
Select a numeric column holding the confidence value.
Lift
Select a numeric column holding the lift value.
Consequence
Select a nominal column representing a rule's right side.
Antecedence
Select a column representing a rule's left side (collection of data cells).

Input Ports

Datatable containing association rules

Views

Rule View
The rule view draws a rule icon (see description above) for each rule contained in the set at the input port. Zooming the view is done via the mouse wheel. Panning is accomplished by right-clicking and dragging. If the the right mouse button is released without having moved since the it was pressed and it is over an icon, a hilighting popup menu is shown. Left-clicking a rule icon brings it to front and selects it by drawing a red border. For all three axes (x-axis, y-axis and icon size in terms of area) there exist scaling values that can be adjusted via the three sliders to left left of the split view. This may be necessary when the rule icons overlap each other or are depicted to far apart.

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Update Site

To use this node in KNIME, install KNIME Rule Viewer Node from the following update site:

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