pub fn correl(real0: &[f64], real1: &[f64], period: usize) -> Vec<Option<f64>>Expand description
Rolling Pearson correlation of real0 and real1 (TA-Lib CORREL) over a
trailing window of raw values. First value at index period - 1; when the
variance product is non-positive TA-Lib emits 0.0.