.. _book_fig_chapter10_fig_wiener_filter:


Wiener Filter Example
---------------------
Figure 10.10

An example of data filtering using a Wiener filter. The upper-left panel shows
noisy input data (200 evenly spaced points) with a narrow Gaussian peak
centered at x = 20. The bottom panels show the input (left) and Wiener-filtered
(right) power spectral density (PSD) distributions. The two curves in the
bottom-left panel represent two-component fit to PSD given by eq. 10.20. The
upper-right panel shows the result of the Wiener filtering on the input: the
Gaussian peak is clearly seen. For comparison, we also plot the result of a
fourth-order Savitzky-Golay filter with a window size of lambda = 10.



.. image:: ../images/chapter10/fig_wiener_filter_1.png
    :scale: 100
    :align: center


.. raw:: html
    
    <div class="toggle_trigger"><a href="#">

**Code output:**

.. raw:: html

    </a></div>
    <div class="toggle_container">

.. literalinclude:: fig_wiener_filter.txt

.. raw:: html

    </div>
    <div class="toggle_trigger" id="start_open"><a href="#">

**Python source code:**

.. raw:: html

    </a></div>
    <div class="toggle_container">

.. literalinclude:: fig_wiener_filter.py
    :lines: 15-

.. raw:: html

    </div>
    <div align="right">

:download:`[download source: fig_wiener_filter.py] <fig_wiener_filter.py>`

.. raw:: html
    
    </div>