Module « scipy.signal »

Fonction get_window - module scipy.signal

Signature de la fonction get_window

def get_window(window, Nx, fftbins=True) 

Description

get_window.__doc__

    Return a window of a given length and type.

    Parameters
    ----------
    window : string, float, or tuple
        The type of window to create. See below for more details.
    Nx : int
        The number of samples in the window.
    fftbins : bool, optional
        If True (default), create a "periodic" window, ready to use with
        `ifftshift` and be multiplied by the result of an FFT (see also
        :func:`~scipy.fft.fftfreq`).
        If False, create a "symmetric" window, for use in filter design.

    Returns
    -------
    get_window : ndarray
        Returns a window of length `Nx` and type `window`

    Notes
    -----
    Window types:

    - `~scipy.signal.windows.boxcar`
    - `~scipy.signal.windows.triang`
    - `~scipy.signal.windows.blackman`
    - `~scipy.signal.windows.hamming`
    - `~scipy.signal.windows.hann`
    - `~scipy.signal.windows.bartlett`
    - `~scipy.signal.windows.flattop`
    - `~scipy.signal.windows.parzen`
    - `~scipy.signal.windows.bohman`
    - `~scipy.signal.windows.blackmanharris`
    - `~scipy.signal.windows.nuttall`
    - `~scipy.signal.windows.barthann`
    - `~scipy.signal.windows.cosine`
    - `~scipy.signal.windows.exponential`
    - `~scipy.signal.windows.tukey`
    - `~scipy.signal.windows.taylor`
    - `~scipy.signal.windows.kaiser` (needs beta)
    - `~scipy.signal.windows.gaussian` (needs standard deviation)
    - `~scipy.signal.windows.general_cosine` (needs weighting coefficients)
    - `~scipy.signal.windows.general_gaussian` (needs power, width)
    - `~scipy.signal.windows.general_hamming` (needs window coefficient)
    - `~scipy.signal.windows.dpss` (needs normalized half-bandwidth)
    - `~scipy.signal.windows.chebwin` (needs attenuation)


    If the window requires no parameters, then `window` can be a string.

    If the window requires parameters, then `window` must be a tuple
    with the first argument the string name of the window, and the next
    arguments the needed parameters.

    If `window` is a floating point number, it is interpreted as the beta
    parameter of the `~scipy.signal.windows.kaiser` window.

    Each of the window types listed above is also the name of
    a function that can be called directly to create a window of
    that type.

    Examples
    --------
    >>> from scipy import signal
    >>> signal.get_window('triang', 7)
    array([ 0.125,  0.375,  0.625,  0.875,  0.875,  0.625,  0.375])
    >>> signal.get_window(('kaiser', 4.0), 9)
    array([ 0.08848053,  0.29425961,  0.56437221,  0.82160913,  0.97885093,
            0.97885093,  0.82160913,  0.56437221,  0.29425961])
    >>> signal.get_window(('exponential', None, 1.), 9)
    array([ 0.011109  ,  0.03019738,  0.082085  ,  0.22313016,  0.60653066,
            0.60653066,  0.22313016,  0.082085  ,  0.03019738])
    >>> signal.get_window(4.0, 9)
    array([ 0.08848053,  0.29425961,  0.56437221,  0.82160913,  0.97885093,
            0.97885093,  0.82160913,  0.56437221,  0.29425961])