navigation map

  1: Introduction
  2: Simple example
  3: Invocation
  4: Finer Control
  5: X-Y Plots
  6: Contour Plots
  7: Image Plots
  8: Examples
  9: Gri Commands
  10: Programming
  11: Environment
  12: Emacs Mode
  13: History
  14: Installation
  15: Gri Bugs
  16: Test Suite
  17: Gri in Press
  18: Acknowledgments
  19: License

index.html#Top Examples.html#Examples Gri: extra examples Gri: contouring example index.html#Top Gri: contouring example

8.1: Box plots

Box plots were invented by Tukey for eda (exploratory data analysis). They show nonparametric statistics. The centre of the box is the median. The box edges show the first quartile (q1) and the third quartile (q3). The distance from q3 to q1 is called the inter-quartile range. The whiskers (lines with crosses on them) extend to the furthest points still within 1.5 inter-quartile ranges of q1 and q3. Beyond the whiskers, all outliers are shown, in open circles up to a distance of 3 inter-quartile ranges beyond q1 and q3, and in closed circles beyond that. Below is an example that uses a "new command" to define each box plot (see Adding New Commands).

Example 7 The command-file.

navigation map