pub fn wavetrend_into_slice(
dst_wt1: &mut [f64],
dst_wt2: &mut [f64],
dst_wt_diff: &mut [f64],
input: &WavetrendInput<'_>,
kern: Kernel,
) -> Result<(), WavetrendError>pub fn wavetrend_into_slice(
dst_wt1: &mut [f64],
dst_wt2: &mut [f64],
dst_wt_diff: &mut [f64],
input: &WavetrendInput<'_>,
kern: Kernel,
) -> Result<(), WavetrendError>