[NUMBERS-163] Summation and LinearCombination Accumulators

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Implemented
• Fix Version/s: 1.0
• Component/s: core
• Assignee: Unassigned
• Reporter: Matt Juntunen
• Created: 12/Jun/21 13:55
• Updated: 14/Oct/22 10:46
• Resolved: 14/Oct/22 10:46

Description

It would be useful to have simple accumulator classes in Summation and LinearCombination to perform extended precision operations on arbitrary collections of values without requiring conversion to double[]. Ex:

Summation.Accumulator sum= Summation.accumulator(1d);
sum.add(x)
    .add(y)
    .add(z)
   .add(w);
double sumResult = sum.get();

LinearCombination.Accumulator comb = LinearCombination.accumulator(1d);
comb.add(x, scale)
    .add(y, scale)
    .add(z, scale)
    .add(w, scale);
double combResult = comb.get();