Java: Data Science Made Easy

Using a Apache Commons to find multiple modes

Another option uses the Apache Commons StatUtils class. This class contains several methods for statistical analysis, including multiple methods for the mean, but we will only examine the mode here. The method is named mode and takes an array of doubles as its parameter. It returns an array of doubles containing all modes of the dataset:

double[] modes = StatUtils.mode(testData); for(double mode : modes){    out.println(mode + " is a mode."); } 

One disadvantage is that we are not able to count the number of times our mode appears within this method. We simply know what the mode is, not how many times it appears. When we execute our code, we get a similar output to our previous example:

12.5 is ...