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Description:

pycwfn 0.1.2

pycw_fn - efficient piecewise functions in Python
This package is a Python wrapper around the pcw_fn Rust crate built using maturin. It supports arbitrary piecewise functions on the real line.
Example
This example constructs a few piecewise functions, does some basic arithmetic with them and finally plots them:
import numpy as np
import matplotlib.pyplot as plt
from numpy.polynomial import Polynomial
from pycw_fn import PcwFn

g_0 = PcwFn.from_funcs_and_jumps(
[
Polynomial([1, 5, -10], window=np.array([-1., 1.]),
domain=np.array([-1., 1.])),
Polynomial([0, 10, -20, 10], window=np.array([-1., 1.]),
domain=np.array([-1., 1.])),
],
[
0.5,
],
)

g_1 = PcwFn.from_funcs_and_jumps(
[
Polynomial([0.4*a**2, -4*a, 10], window=np.array([-1., 1.]),
domain=np.array([-1., 1.])) for a in range(6)
],
[
0.1,
0.3,
0.5,
0.7,
0.9,
],
)

b_2 = Polynomial([1/10, -4, 40])
g_2 = PcwFn.from_funcs_and_jumps(
[b_2(Polynomial([-0.1*a, 1])) for a in range(10)],
np.linspace(0.1, 1, num=9, endpoint=False),
)

g = g_0 + 5 * g_2

ts = np.linspace(0, 1, num=1000)
ys = g(ts)
plt.plot(ts, ys)
plt.show()