@staticmethod
def plot_file_distances(dist_matrix):
    """
        Plots dist_matrix

        Parameters
        ----------
        dist_matrix: np.ndarray
        """
    import matplotlib.pyplot as plt
    fig = plt.figure()
    ax = fig.add_subplot(111)
    ax.matshow(dist_matrix, interpolation='nearest', cmap=plt.cm.get_cmap(
        'PuBu'))
