How to find the intersection of two curves?
Multi tool use
How to find the intersection of two curves?
How do I find the intersection of two curves given by arrays y1 and y2, having the same x values? This is my current code:
y1
y2
import numpy as np
import matplotlib.pyplot as plt
from scipy import optimize
fig = plt.figure()
ax = fig.add_subplot(111)
Ls = [2, 4]
for L in range(len(Ls)):
x = np.arange(10)
y1 = np.array([2, 4, 6, 8, 10, 12, 14, 16, 18, 20])
y2 = np.array([20, 18, 16, 14, 12, 10, 8, 6, 4, 2])
ax.plot(x, y1, x, y2)
ax.set_label("x")
ax.set_label("y")
f = np.sign(y1 - y2)
optimize.bisect(f, 4, 6)
I'm getting an error in bisect:
bisect
...
File "...scipyoptimizezeros.py", line 249, in bisect
r = _zeros._bisect(f,a,b,xtol,rtol,maxiter,args,full_output,disp)
TypeError: 'numpy.ndarray' object is not callable
intersect1d()
What is the expected output in your example? When talking about the intersection of datasets, it usually means common elements. What you want to know is the intersection of curves, which is related but not the same thing. Please also include all imports to make the example runnable.
– Dev-iL
Jul 3 at 16:05
See stackoverflow.com/questions/50437865/…
– Warren Weckesser
Jul 3 at 17:52
Possible duplicate of finding the interpolated intersection between two arrays in Python/Numpy/Scipy
– Dev-iL
Jul 4 at 8:18
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Have you tried using numpy's
intersect1d()method?– Rahul Bohare
Jul 3 at 10:03