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.

Constructors
Constructor and Description
`ScreePlot(smile.projection.PCA pca)` Constructor.

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`Canvas`	`canvas()` Returns a canvas of the plot.
`double[]`	`getLowerBound()` Returns the lower bound of data.
`double[]`	`getUpperBound()` Returns the upper bound of data.
`java.util.Optional<Legend[]>`	`legends()` Returns the optional name of shape, which will be used to draw a legend outside the box.
`void`	`paint(Graphics g)` Draws the shape.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Class ScreePlot