bletl.heuristics

Signal analysis based on simple, deterministic heuristics.

bletl.heuristics.find_do_peak(x: ndarray, y: ndarray, *, delay_a: float, threshold_a: float, delay_b: float, threshold_b: float, initial_delay: float = 1) → int | None

Finds the index of a DO peak in the inputs [x] and [y].

Parameters:

xnumpy.ndarray

Time vector.

ynumpy.ndarray

DO vector.

initial_delayfloat

Hours in the beginning that are not considered.

delay_afloat

Hours for which condition A must be fulfilled.

threshold_afloat

DO threshold that must be UNDERshot for at least <delay_a> hours.

delay_bfloat

Hours for which condition B must be fulfilled.

threshold_bfloat

DO threshold that must be OVERshot for at least <delay_b> hours.

Returns:

i_overshootint

Index (w.r.t. inputs [x] and [y]) at which the DO peak was detected. None is returned if no peak was detected according to the given conditions.