.. highlightlang:: us

.. index:: conv

.. _conv:

conv
====

.. us.tag  conv ENGLISH fft New5508

The :ref:`conv` function combines two signals to form a new signal, for example,
calculates the output signal for an input signal and the impulse response signal.

.. function::  w = conv(u, v)

.. us.return

**Return Value**

*w* is the convolution of *u* and *v*. The length of *w* is ``len(u)+len(v)+1``.
 
.. us.params

**Parameters**

.. uparam:: u

   *u* is a real vector.

.. uparam:: v

   *v* is a real vector.

.. us.example

**Example**

::

   u = [10,20,30,40];
   v = [1,2,3];
   c = conv(u, v);

.. seealso::
   :ref:`overview-mathematic`,
   :ref:`deconv`

:sub:`id-941953`