Python 中 matplotlib 等高线图的 ValueError

Question

我在运行时收到 "ValueError: setting an array element with a sequence"。我试图将所有内容都变成一个 numpy 数组，但无济于事。

import matplotlib
import numpy as np
from matplotlib import pyplot

X=np.array([
    np.array([1,2,3,4,5,6,7]),
    np.array([1,2,3,4,5,6,7]),
    np.array([1,2,3,4,5,6,6.5,7.5]),
    np.array([1,2,3,4,5,6,7,8]),
    np.array([1,2,3,4,5,6,7,8,8.5]),
    np.array([1,2,3,4,5,6,7,8]),
    np.array([1,2,3,4,5,6,7])])

Y=np.array([
    np.array([1,1,1,1,1,1,1]),
    np.array([2,2,2,2,2,2,2]),
    np.array([3,3,3,3,3,3,2.5,3]),
    np.array([4,4,4,4,4,4,4,4]),
    np.array([5,5,5,5,5,5,5,5,5]),
    np.array([6,6,6,6,6,6,6,6]),
    np.array([7,7,7,7,7,7,7])])

Z=          np.array([
            np.array([4190, 4290, 4200, 4095, 4181, 4965, 4995]),
            np.array([4321, 4389, 4311, 4212, 4894, 4999, 5001]),
            np.array([4412, 4442, 4389, 4693, 4899, 5010, 5008, 4921]),
            np.array([4552, 4651, 4900, 4921, 4932, 5020, 4935, 4735]),
            np.array([4791, 4941, 4925, 5000, 4890, 4925, 4882, 4764, 4850]),
            np.array([4732, 4795, 4791, 4852, 4911, 4865, 4919, 4862]),
           np.array([4520, 4662, 4735,4794,4836,4852,4790])])

matplotlib.pyplot.contour(X, Y, Z)

编辑我通过从子数组中删除值以使长度相等来解决这个问题，但是我仍然想知道如何将包含不同长度子数组的数组馈送到等高线图中。

Answer 1

答案是让 X、Y 和 Z 输入所有一维数组，并使用 tricontour 而不是 contour。

X=np.array([1,2,3,4,5,6,7,
        1,2,3,4,5,6,7,
        1,2,3,4,5,6,6.5,7.5,
        1,2,3,4,5,6,7,8,
        1,2,3,4,5,6,7,8,9,
        1,2,3,4,5,6,7,8,
        1,2,3,4,5,6,7])

Y=np.array([1,1,1,1,1,1,1,
2,2,2,2,2,2,2,
3,3,3,3,3,3,2.5,3,
4,4,4,4,4,4,4,4,
5,5,5,5,5,5,5,5,5,
6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7])

Z=     np.array([80, 73, 65, 57, 61, 55, 60,
        78, 73, 71, 55, 55, 60, 90,
        65, 62, 61, 61, 51, 60, 71, 78,
        70, 58, 58, 65, 80, 81, 90, 81,
        80, 59, 51, 58, 70, 70, 90, 89, 78,
        90, 63, 55, 58, 65, 78, 79, 70,
        100, 68, 54,52,60,72,71])

Y=np.flip(Y,0)

asdf=matplotlib.pyplot.tricontour(X, Y, Z,11)
matplotlib.pyplot.xlim([1,8])
matplotlib.pyplot.ylim([1,7])
matplotlib.pyplot.clabel(asdf, fontsize=6, inline=0)
matplotlib.pyplot.show()

Python 中 matplotlib 等高线图的 ValueError

ValueError for a matplotlib contour plot in Python

numpy

matplotlib

contour

python-3.x

valueerror