Question

这是此主题的后续行动： Python : 2d contour plot from 3 lists : x, y and rho?

我基本上复制了如下所示的代码，但为我的应用程序找到了2个剩余的问题：

可能因为z数据彼此如此接近，我得到了一个类似a plot here的情节，这似乎不正确。
我还想绘制x，y范围从-50到50的地图，这可能需要外推？任何人都可以帮助他们吗？非常感谢！

def contour2d(xlist, ylist, zlist):

    x = np.array(xlist)
    y = np.array(ylist)
    z = np.array(zlist)    
    xi, yi = np.linspace(x.min(), x.max(), 100), np.linspace(y.min(), y.max(), 100)
    xi, yi = np.meshgrid(xi, yi)

    rbf = scipy.interpolate.Rbf(x, y, z, function='linear')
    zi = rbf(xi, yi)
    print zi

    plt.imshow(zi, vmin=z.min(), vmax=z.max(), origin='lower',
           extent=[x.min(), x.max(), y.min(), y.max()])

    plt.scatter(x,y,c=z)
    plt.colorbar()
    plt.show()

x = [0,20.506,20.506,-20.506,-20.506,41.012,41.012,-41.012,-41.012]
y = [0,-20.506,20.506,20.506,-20.506,-41.012,41.012,41.012,-41.012]
z = [1.45905, 1.45874, 1.45861, 1.45914, 1.45909, 1.4584, 1.45793, 1.45883, 1.45863]
contour2d(x,y,z)

Python：3个列表中的2d等高线图

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