.. note::
    :class: sphx-glr-download-link-note

    Click :ref:`here <sphx_glr_download_intro_scipy_auto_examples_plot_interpolation.py>` to download the full example code
.. rst-class:: sphx-glr-example-title

.. _sphx_glr_intro_scipy_auto_examples_plot_interpolation.py:


============================
A demo of 1D interpolation
============================





.. image:: /intro/scipy/auto_examples/images/sphx_glr_plot_interpolation_001.png
    :class: sphx-glr-single-img





.. code-block:: python


    # Generate data
    import numpy as np
    np.random.seed(0)
    measured_time = np.linspace(0, 1, 10)
    noise = 1e-1 * (np.random.random(10)*2 - 1)
    measures = np.sin(2 * np.pi * measured_time) + noise

    # Interpolate it to new time points
    from scipy.interpolate import interp1d
    linear_interp = interp1d(measured_time, measures)
    interpolation_time = np.linspace(0, 1, 50)
    linear_results = linear_interp(interpolation_time)
    cubic_interp = interp1d(measured_time, measures, kind='cubic')
    cubic_results = cubic_interp(interpolation_time)

    # Plot the data and the interpolation
    from matplotlib import pyplot as plt
    plt.figure(figsize=(6, 4))
    plt.plot(measured_time, measures, 'o', ms=6, label='measures')
    plt.plot(interpolation_time, linear_results, label='linear interp')
    plt.plot(interpolation_time, cubic_results, label='cubic interp')
    plt.legend()
    plt.show()

**Total running time of the script:** ( 0 minutes  0.018 seconds)


.. _sphx_glr_download_intro_scipy_auto_examples_plot_interpolation.py:


.. only :: html

 .. container:: sphx-glr-footer
    :class: sphx-glr-footer-example



  .. container:: sphx-glr-download

     :download:`Download Python source code: plot_interpolation.py <plot_interpolation.py>`



  .. container:: sphx-glr-download

     :download:`Download Jupyter notebook: plot_interpolation.ipynb <plot_interpolation.ipynb>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.readthedocs.io>`_