private static List <double> ClassifyByJenksFisher(int numBreaks, List <ValueCountTuple> tuples)
{
var breaksArray = new List <double>(numBreaks);
if (numBreaks == 0)
{
return(breaksArray);
}
// Avoid array <-> list conversations
breaksArray.AddRange(Enumerable.Repeat(0.0d, numBreaks));
var classificator = new NaturalBreaks(tuples, numBreaks);
if (numBreaks > 1)
{
// Runs the actual calculation
classificator.CalculateAll();
var lastClassBreakIndex = classificator.FindMaxBreakIndex(classificator._bufferSize - 1, 0, classificator._bufferSize);
while (--numBreaks != 0)
{
// Assign the break values to the result
breaksArray[numBreaks] = tuples[lastClassBreakIndex + numBreaks].Value;
if (numBreaks > 1)
{
classificator._classBreaksIndex -= classificator._bufferSize;
lastClassBreakIndex = classificator._classBreaks[classificator._classBreaksIndex + lastClassBreakIndex];
}
}
}
breaksArray[0] = tuples[0].Value;
return(breaksArray);
}
