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Occurrence Matrix

Occurrence Matrix

Context

The Occurrence Matrix graph displays a two-dimensional table of the selected variables plus the statistics of the corresponding independence test.

Usage

  • You can access the Occurrence Matrix function in multiple ways:
    • Main Menu > Data > Charts > Occurrence Matrix.
    • Node Context Menu > Charts > Occurrence Matrix.
  • In the Parameter panel, select any of the available variables from the drop-down lists:
    • Select the Row Variable.
    • Select the Column Variable.
  • If you had nodes selected when you opened the Charts window, the variables in the dropdown menus will be restricted to that selection.
  • Check one of the following options:
    • Absolute.
    • Percent.
    • Row Percent.
    • Column Percent.
  • If a learning/test set split is defined, you can furthermore specify which subset to use.
  • Click Show to produce the chart.
ChartsBarOccurrenceMatrixEditor
  • The right panel contains all the information about the χ²-test or G-tests plus the computed degrees of freedom.
    • You can choose the type of independence test, G or χ² under Main Menu > Window > Preferences > Tools > Statistical Tools.
    • Note that Missing Values are not taken into account for the independence test, but Weights are.
ChartsOccurrenceMatrixChart

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