Class: DatasetStatistics

Inherits:
Object
  • Object
show all
Defined in:
lib/math/dataset_statistics.rb

Overview

singleton class to apply statistic methods to a data series

Class Method Summary collapse

Class Method Details

.subtract_datasets(first_data, second_data) ⇒ DataSet

singleton method to calculate the differences of two datasets with

result[i][j] = first_data[i][j] - second[i][j]

Parameters:

  • first_data (DataSet) —

    data_set representing the minuend

  • second_data (DataSet) —

    data_set representing the subtrahend

Returns:

  • (DataSet) —

    new data set with the substracted values



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# File 'lib/math/dataset_statistics.rb', line 16

def self.subtract_datasets(first_data, second_data)
  result = Array.new()

  # subtract first_data[i][j] - second_data[i][j]
  first_data.data.keys.each { |index|
    first_list = first_data.data[index]
    second_list = second_data.data[index]
    line = Array.new()
    first_list.each_index { |list_index|
      line << (first_list[list_index] - second_list[list_index])
    }
    result << line
  }

  # create new data set and return it
  DataInput::DataSet.new(result)
end