plot.py 文件源码

def plot_cov_ellipse(cov, pos, nstd=2, **kwargs):
    """Plot confidence ellipse."""
    r1, r2, theta = cov_ellipse(cov, nstd)
    ellip = Ellipse(xy=pos, width=2*r1, height=2*r2, angle=theta, **kwargs)

    plt.gca().add_artist(ellip)
    return ellip