Top-Down Reconciliation

Problem

Allocate an aggregate forecast to children using historical proportions. Normalize the proportions to sum to 1 and multiply each by the aggregate.

Return the list of child forecasts; if all proportions are zero return a list of zeros.

Hint

Normalizing makes the children always add up to the aggregate.

case 1

in: [100,[0.5,0.3,0.2]]

expected: [50,30,20]

case 2

in: [12,[1,1,1]]

expected: [4,4,4]

case 3

in: [5,[2]]

expected: [5]

case 4

in: [10,[0,0]]

expected: [0,0]

Starter codePython

def top_down_reconciliation(aggregate_forecast, proportions):
    # Your code here
    pass

4 test cases · run your code against them in the editor