Python에서 Y축 및 기타 곡선을 사용하여 곡선의 교차점을 찾는 방법은 무엇입니까?

<code class="python">import numpy as np
import matplotlib.pyplot as plt

# Generate sample data
N = 750
x = 0.4 + np.sort(np.random.rand(N)) * 3.5
y = (x - 4) * np.cos(x * 9.) * np.cos(x * 6 + 0.05) + 0.1

# Define a function to find roots (zeros)
def find_roots(x, y):
    s = np.abs(np.diff(np.sign(y))).astype(bool)
    return x[:-1][s] + np.diff(x)[s] / (np.abs(y[1:][s] / y[:-1][s]) + 1)

# Find the intersection point
z = find_roots(x, y)

# Plot the curve and the intersection point
plt.plot(x, y)
plt.plot(z, np.zeros(len(z)), marker="o", ls="", ms=4)
plt.show()</code>

<code class="python">y0 = 1.4
z = find_roots(x, y - y0)
# ...
plt.plot(z, np.zeros(len(z)) + y0)</code>

<code class="python">x = .4 + np.sort(np.random.rand(N)) * 3.5
y1 = (x - 4) * np.cos(x * 9.) * np.cos(x * 6 + 0.05) + 0.1
y2 = (x - 2) * np.cos(x * 8.) * np.cos(x * 5 + 0.03) + 0.3

z = find_roots(x, y2 - y1)

plt.plot(x, y1)
plt.plot(x, y2, color="C2")
plt.plot(z, np.interp(z, x, y1), marker="o", ls="", ms=4, color="C1")</code>