Class ScreePlot

java.lang.Object
smile.plot.swing.Shape
smile.plot.swing.Plot
smile.plot.swing.ScreePlot
public class ScreePlot extends Plot
In multivariate statistics, a scree plot is a line plot of the eigenvalues of factors or principal components in an analysis. The scree plot is used to determine the number of factors to retain in an exploratory factor analysis (FA) or principal components to keep in a principal component analysis (PCA). The procedure of finding statistically significant factors or components using a scree plot is also known as a scree test.

A scree plot always displays the eigenvalues in a downward curve, ordering the eigenvalues from largest to smallest. According to the scree test, the "elbow" of the graph where the eigenvalues seem to level off is found and factors or components to the left of this point should be retained as significant. It is named after its resemblance to scree after its elbow.

  • Constructor Details

    • ScreePlot

      public ScreePlot(double[] varianceProportion)
      Constructor.
      Parameters:
      varianceProportion - The proportion of variance contained in each principal component.

  • Method Details

    • paint

      public void paint(Renderer g)
      Description copied from class: Shape
      Draws the shape.
      Specified by:
      paint in class Shape
      Parameters:
      g - the renderer.

    • legends

      public Optional<Legend[]> legends()
      Description copied from class: Plot
      Returns the optional legend of shape.
      Overrides:
      legends in class Plot
      Returns:
      the optional legend of shape

    • figure

      public Figure figure()
      Description copied from class: Plot
      Returns a figure containing the plot.
      Overrides:
      figure in class Plot
      Returns:
      a figure containing the plot.

    • getLowerBound

      public double[] getLowerBound()
      Description copied from class: Plot
      Returns the lower bound of data.
      Specified by:
      getLowerBound in class Plot
      Returns:
      the lower bound of data.

    • getUpperBound

      public double[] getUpperBound()
      Description copied from class: Plot
      Returns the upper bound of data.
      Specified by:
      getUpperBound in class Plot
      Returns:
      the upper bound of data.