我对Python Matplot很陌生。我试图绘制一个三维条形图，其中条形的高度是z，条形的位置是我数组的x，y。
这是我的数据示例，我有一个10*10数组：
data = np.array([[0.1729,0.8658,0.9283,0.9381,0.9535,1.0000,1.0000,0.9999,0.9999,1.0000],
[-0.0430,0.3109,0.2788,0.5846,0.5369,0.5717,0.6357,0.5619,0.5866,0.6587],
[-0.2228,0.3427,0.1842,0.2106,0.4398,0.3896,0.4687,0.5749,0.4684,0.5484],
[0.0011,0.2899,0.1854,0.1040,0.3513,0.3863,0.3971,0.4485,0.2514,0.4946],
[-0.0096,0.0630,0.1564,-0.0077,0.0825,0.1637,0.2627,0.4800,0.3931,0.3244],
[0.0134,0.1198,0.3339,0.1243,-0.0864,0.4048,0.1996,0.3988,0.1970,0.5248],
[-0.0153,0.2806,0.1926,0.1918,0.0860,0.1054,0.3202,0.3063,0.2644,0.3791],
[-0.1118,0.3065,0.1396,0.0949,0.3459,0.1168,0.3730,0.0741,0.3518,0.2150],
[0.1022,0.3144,-0.1165,0.0509,0.1462,0.3265,0.2087,0.2549,0.3914,0.2683],
[-0.0083,-0.0228,0.0721,0.1086,0.2400,0.1899,0.0922,0.1006,0.2430,0.2768]])
我正在使用以下代码生成三维条形图：
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np
fig = plt.figure()
ax1 = Axes3D(fig)
xpos = np.arange(data.shape[0])
ypos = np.arange(data.shape[1])
zpos = data
xposM, yposM = np.meshgrid(xpos, ypos, copy=False)
dx=0.5
dy=0.5
dz=zpos
ax1.bar3d(xposM.ravel(), yposM.ravel(), dz, dx, dy, dz)
plt.show()
但我得到了这个错误：
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
有人知道我的代码有什么问题吗？
您的代码有两个问题。
1:zpos不应为=data；这是你遇到的主要问题。
2：您应该（可能）将bar3d称为ax1.bar3d(xposM.ravel(), yposM.ravel(), zpos, dx, dy, dz)。就目前情况来看，你正在定位你的酒吧，使它们的底座位于它们应该去的地方。也就是说，高度为3的条将从z＝3开始，到达z＝6，高度为-2.1的条将在z＝-2.1开始。
对于第一个问题，xpos和ypos具有形状（100，），而data具有形状（10，10）。你需要它们具有相同的尺寸，所以我建议包括zpos = np.zeros(len(data.ravel()))。这也意味着您需要设置dz = data.ravel()。