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# Source code for pyewt.usefullfunc

    import numpy as np

    def round_away(x):

        """ Function that rounds away from 0 to mimic the Matlab
        round function.

        Examples: 2.3 -> 2 ; 2.7 -> 3 ; 2.5 -> 3

        Parameters
        ----------
        x : number to round

        Returns
        -------
        rounded value

        Function found at
        https://stackoverflow.com/questions/59142749/how-to-round-away-from-zero
        """
        a = np.abs(x)
        b = np.floor(a) + np.floor(2*(a%1))
        return np.sign(x)*b

    def beta(x):

        """
        Beta function used in Meyer and Littlewood-Paley mother wavelets definitions
        """
        if x < 0:
            return 0
        elif x > 1:
            return 1
        else:
            return np.power(x,4) * (35 - 84*x + 70*np.power(x,2) - 20*np.power(x,3))