Function caminos_lib::pattern::proportional_vec_with_sum

pub fn proportional_vec_with_sum(
    weights: &Vec<f64>,
    target_sum: usize
) -> Vec<usize>

Build an integer vector with elements proportional to the given weights and with a total target_sum. Based on https://stackoverflow.com/questions/16226991/allocate-an-array-of-integers-proportionally-compensating-for-rounding-errors