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CustomBoxPlot Class

Base box plot style. The BoxPlot and HorizBoxPlot styles are both derived from this class.

Dew_Stats_Tee_CustomBoxPlot
Syntax
C#
Visual Basic
public class CustomBoxPlot : Steema.TeeChart.Styles.Points;

BoxPlot.cs

There are several ways to construct a box plot. This version uses the following approach:

  • Calculate the first quartile (Q1), the Median and third quartile (Q3).
  • Calculate the interquartile range (IQR) by subtracting the first quartile from the third quartile.
  • Construct a box bounded by the first and third quartile.
  • Indicate where the median lies inside of the box with the presence of a symbol or a line dividing the box at the Median value.
  • The mean value of the data is also indicated with a line inside a box.
  • Any data observation which lies more than WhiskerLength*IQR lower than the InnerFence1 or WhiskerLength*IQR higher than the InnerFence3 is considered an outlier. Indicate where the smallest value that is not an outlier is by a vertical tic mark or "whisker", and connect the whisker to the box via a horizontal line (AdjacentPoint1). Likewise, indicate where the largest value that is not an outlier is by a "whisker", and connect that whisker to the box via another horizontal line (AdjacentPoint3).
  • Indicate outliers by different pointer styles. "Extreme" outliers, or those which lie more than 2*WhiskerLength times the IQR to the bottom OuterFence1and top OuterFence3 from the first and third quartiles, respectively, are indicated by the presence of an open dot. "Mild" outliers - that is, those observation which lie more than WhiskerLength times the IQR from the first and third quartile but are not also extreme outliers are indicated by different pointer style.
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