.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "examples/lowpassfilter.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_examples_lowpassfilter.py>`
        to download the full example code.

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_examples_lowpassfilter.py:


============================
Simple lowpass filter design.
============================

.. GENERATED FROM PYTHON SOURCE LINES 6-12

.. code-block:: Python


    from mplsignal import freqz_fir

    from fird.designer import FIRDesigner
    from fird.objective import PiecewiseLinearObjective








.. GENERATED FROM PYTHON SOURCE LINES 13-14

First, design a filter minimizing the approximation error using a filter order of 30.

.. GENERATED FROM PYTHON SOURCE LINES 14-20

.. code-block:: Python

    o = PiecewiseLinearObjective([0, 0.3, 0.5, 1], [1, 1, 0, 0])
    d = FIRDesigner(30, o)
    d.solve()
    h30 = d.get_impulse_response()
    freqz_fir(h30).show()




.. image-sg:: /examples/images/sphx_glr_lowpassfilter_001.png
   :alt: lowpassfilter
   :srcset: /examples/images/sphx_glr_lowpassfilter_001.png
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 21-22

Increase the filter order to 31.

.. GENERATED FROM PYTHON SOURCE LINES 22-26

.. code-block:: Python

    d = FIRDesigner(31, o)
    d.solve()
    h31 = d.get_impulse_response()
    freqz_fir(h31).show()



.. image-sg:: /examples/images/sphx_glr_lowpassfilter_002.png
   :alt: lowpassfilter
   :srcset: /examples/images/sphx_glr_lowpassfilter_002.png
   :class: sphx-glr-single-img






.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 1.358 seconds)


.. _sphx_glr_download_examples_lowpassfilter.py:

.. only:: html

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

    .. container:: sphx-glr-download sphx-glr-download-jupyter

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

    .. container:: sphx-glr-download sphx-glr-download-python

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

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: lowpassfilter.zip <lowpassfilter.zip>`


.. only:: html

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

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