<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def count_above_mean(x):
 """ Returns the number of values in x that are higher than the mean of x :param x: the time series to calculate the feature of :type x: numpy.ndarray :return: the value of this feature :return type: float """

    m = np.mean(x)
    return np.where(x > m)[0].size