def METHOD_NAME(self, tr_min, tr_max):
    import matplotlib.pyplot as plt
    from numpy import arange
    step = (tr_max - tr_min) / 50
    tr_range = arange(tr_min, tr_max, step)
    theta_E = self.getErnstAngle(tr_range)
    printv("\nDrawing", type='info')
    plt.plot(tr_range, theta_E, linewidth=1.0)
    plt.xlabel("TR (in $ms$)")
    plt.ylabel("$\\Theta_E$ (in degree)")
    plt.ylim(min(theta_E), max(theta_E) + 2)
    plt.title("Ernst Angle with T1=" + str(self.t1) + "ms")
    plt.grid(True)
    if self.tr is not None:
        plt.plot(self.tr, self.getErnstAngle(self.tr), 'ro')
    if self.fname_output is not None:
        printv("\nSaving figure", type='info')
        plt.savefig(self.fname_output, format='png')
    plt.show()