pub(crate) fn linear_regression(
times: &TimestampMillisecondArray,
values: &Float64Array,
intercept_time: i64,
) -> (Option<f64>, Option<f64>)Expand description
linear_regression performs a least-square linear regression analysis on the times and values. It return the slope and intercept based on times and values. Prometheus’s implementation: https://github.com/prometheus/prometheus/blob/90b2f7a540b8a70d8d81372e6692dcbb67ccbaaa/promql/functions.go#L793-L837