A tool for calculating head/tail breaks 2.0
see https://en.wikipedia.org/wiki/Head/tail_Breaks
For calculations using less than 10.000 datapoints use ExcelHTCalculatorOneColumn.xlsx and insert data into column A
For calculation using between 10.000 and 50.000 datapoints use ExcelHTCalculatorOneColumn50K.xlsx and insert data into column A
For calculations using more than 50.000 datapoints create a histogram of the data and use ExcelHTCalculatorTwoColumnsv6.xlsx with column A being the "count" (i.e. amount of datapoints of a value) column B being the "value" (i.e. the value of the datapoint)
Alternatively with less than 1.048.576 different values and datapoints a histogram need not be made and for input use column A being 1 column B being the values of the datapoints