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Big Data Analytics with Java by Rajat Mehta

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Box plots

Another very useful type of charts is box chart. Before looking into box charts, let's revise some simple mathematical concepts next. You can skip this page and directly go to the chart as well.

Suppose you have an array of numbers as shown here:

int[] numbersArr = { 5, 6, 8, 9, 2 };

Now, from this array, we have to find the following simple math stats:

  • Min: This is just the minimum value from the array and as you can see it is 2
  • Max: This is the maximum value from the array and this as you can see, is 9
  • Mean: This is the mean value of the array elements. Mean is nothing but the average value. Hence in this case it is the sum of array elements divided by the number of elements in the array.
    	(5 + 6 + 8 + 9 + 2) / 5 = 6
  • Median: If we sort the ...

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