def idecibel(x):
    """Calculates the inverse of input decibel values

    :math:`z=10^{x \\over 10}`

    Parameters
    ----------
    x : a number or an array

    Examples
    --------
    >>> from wradlib.trafo import idecibel
    >>> print(idecibel(10.))
    10.0

    """
    return 10.0 ** (x / 10.0)
