First import the Profile class of pybeach:

from pybeach import Profile

Given an array of cross-shore coordinates, x of shape (m,) and corresponding elevations z of shape (m,) for a single profile or shape (m, n) for n profiles, pybeach can be used as follows to make predictions of the dune toe location:

# example data
import numpy as np
x = np.arange(0, 80, 0.5)
z = np.concatenate((np.linspace(4, 5, 40),
                    np.linspace(5, 2, 10),
                    np.linspace(2, 0, 91)[1:],
                    np.linspace(0, -1, 20)))

# Instantiate Profile class
p = Profile(x, z)

# Predict dune toe location
toe_ml = p.predict_dunetoe_ml('mixed_clf') # use the machine learning (ML) method
toe_mc = p.predict_dunetoe_mc() # use the maximum curvature (MC) method
toe_rr = p.predict_dunetoe_rr() # use the relative relief (RR) method
toe_pd = p.predict_dunetoe_pd() # use the perpendicular distance (PD) method

# (optional) Predict shoreline and dune crest location
crest = p.predict_dunecrest()
shoreline = p.predict_shoreline()