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Berthold Höllmann's berhoelSplines module🔗

Description🔗

  • berhoel.splines.line -- Class for representing lines between two points.
  • berhoel.splines.akima -- Cubic interpolation using Akima subsplines.

  • Tbd

    berhoel.splines.renner -- Cubic interpolation using Renner subsplines.

Installation🔗

pip install https://gitlab.com/berhoel/python/berhoelSplines.git

Availability🔗

The latest version should be available at my GitLab repository.

Documentation🔗

Documentation for the project is avaliable here.

Example with NACA foil data🔗

# mkdocs: render
from pathlib import Path

import matplotlib.pyplot as plt
import numpy as np

from berhoel.splines import AkimaSubspline

NACA0012 = Path("NACA0012")

data = []
with NACA0012.open("r") as inp:
    for line in inp:
        if not line.strip() or line.strip().startswith("#"):
            continue
        data.append([float(i) for i in line.strip().split()[:2]])

naca = AkimaSubspline(np.linspace(0, 1, len(data)), data)(np.linspace(0, 1, 4000))

fig, ax = plt.subplots(2, 1)

ax[0].plot(naca[:, 0], naca[:, 1])
ax[0].plot(np.array(data)[:, 0], np.array(data)[:, 1], "o-")
ax[0].set_aspect("equal", adjustable="box")
ax[1].plot(naca[:, 0], naca[:, 1])
ax[1].plot(np.array(data)[:, 0], np.array(data)[:, 1], "o-")
ax[1].set_xlim(-.0001, .004)
ax[1].set_ylim(-.01, .01)
fig.show()