Plotting box plots or whisker diagrams
Box plots are another effective visualization tool for data scientists. They give important descriptive statistics of a data distribution. A typical box plot will contain the following information about a data distribution:
Minimum value
First quartile
Median
Third quartile
Maximum value
Other values such as inter-quartile range can also be derived from these statistics by getting the difference between the third and first quartiles.
In this recipe, you will be using GRAL to draw box plots for data distributions.
Getting ready
To use GRAL to plot bar charts, we need the example applications provided with the library in the form of Jar files. These example applications can be downloaded from http://trac.erichseifert.de/gral/wiki/Download. Download the
gral-examples-0.10.zipfile from the download location into your local disk. Extract the files.Once you download the ZIP files and extract them, you will see a directory structure as shown in the Getting ready section...
