A class to save pairs of observations to an array of double arrays, each with size 2.
The default increment for the array size
Counts the number of data points that were saved to the save array
A flag to indicate whether the saver should save the data as it is collected. If this flag is true, the data will be saved when the save() method is called.
Clears any data that has been saved
This method is called when the observable needs observing
Writes out the saved data to a file.