Method medianAbsolutePercentError

src/bench/nanobench.h:2914–2930

}

double Result::medianAbsolutePercentError(Measure m) const {
    // create copy
    auto data = mNameToMeasurements[detail::u(m)];

    // calculates MdAPE which is the median of percentage error
    // see https://www.spiderfinancial.com/support/documentation/numxl/reference-manual/forecasting-performance/mdape
    auto med = calcMedian(data);

    // transform the data to absolute error
    for (auto& x : data) {
        x = (x - med) / x;
        if (x < 0) {
            x = -x;
        }
    }
    return calcMedian(data);
}

double Result::sum(Measure m) const noexcept {
    auto const& data = mNameToMeasurements[detail::u(m)];