Traceback (most recent call last): File "symmetry.py", line 17, in <module> centers = C_coords[np.random.choice(C_coords.shape[0], size=n_clusters, replace=False)] File "mtrand.pyx", line 903, in numpy.random.mtrand.RandomState.choice ValueError: a must be greater than 0 unless no samples are taken。import numpy as np from scipy.spatial.distance import cdist # 读取POSCAR文件 with open('69_POSCAR', 'r') as f: lines = f.readlines() # 提取晶格矢量和C原子坐标 lattice = np.array([list(map(float, lines[i].split())) for i in range(2, 5)]) coords = np.array([list(map(float, line.split())) for line in lines[8:]]) # 提取C原子的坐标 C_coords = coords[coords[:, 2] == 6][:, :3] # 初始化聚类中心 n_clusters = 3 centers = C_coords[np.random.choice(C_coords.shape[0], size=n_clusters, replace=False)] # 迭代聚类 max_iter = 100 for i in range(max_iter): # 计算每个C原子到聚类中心的距离 distances = cdist(C_coords, centers) # 分配聚类标签 labels = np.argmin(distances, axis=1) # 更新聚类中心 for j in range(n_clusters): centers[j] = np.mean(C_coords[labels == j], axis=0) # 输出聚类结果和聚类中心 print('C原子聚类结果:') for i in range(len(C_coords)): print('C{}: ({:.3f}, {:.3f}, {:.3f}),聚类标签:{}'.format( i+1, C_coords[i][0], C_coords[i][1], C_coords[i][2], labels[i]+1)) print('聚类中心:') for i in range(len(centers)): print('聚类{}中心:({:.3f}, {:.3f}, {:.3f})'.format(i+1, centers[i][0], centers[i][1], centers[i][2]))。修改代码。
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linux 下 pip3 报错“ File “/usr/bin/pip3”, line 9, in from pip import mainImportError: canno”处理
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这个错误是由于`C_coords`数组中没有足够的元素供你选择,导致`np.random.choice`函数出现了错误。解决这个问题的方法是检查`C_coords`数组的长度是否足够,并根据情况修改`n_clusters`的值,或者使用`if`语句来避免出现这种情况。
下面是修改后的代码:
``` python
import numpy as np
from scipy.spatial.distance import cdist
# 读取POSCAR文件
with open('69_POSCAR', 'r') as f:
lines = f.readlines()
# 提取晶格矢量和C原子坐标
lattice = np.array([list(map(float, lines[i].split())) for i in range(2, 5)])
coords = np.array([list(map(float, line.split())) for line in lines[8:]])
# 提取C原子的坐标
C_coords = coords[coords[:, 2] == 6][:, :3]
# 检查C_coords数组是否为空
if C_coords.size == 0:
print("没有找到C原子")
else:
# 初始化聚类中心
n_clusters = min(C_coords.shape[0], 3) # 取C原子数量和3的较小值
centers = C_coords[np.random.choice(C_coords.shape[0], size=n_clusters, replace=False)]
# 迭代聚类
max_iter = 100
for i in range(max_iter):
# 计算每个C原子到聚类中心的距离
distances = cdist(C_coords, centers)
# 分配聚类标签
labels = np.argmin(distances, axis=1)
# 更新聚类中心
for j in range(n_clusters):
centers[j] = np.mean(C_coords[labels == j], axis=0)
# 输出聚类结果和聚类中心
print('C原子聚类结果:')
for i in range(len(C_coords)):
print('C{}: ({:.3f}, {:.3f}, {:.3f}),聚类标签:{}'.format(
i+1, C_coords[i][0], C_coords[i][1], C_coords[i][2], labels[i]+1))
print('聚类中心:')
for i in range(len(centers)):
print('聚类{}中心:({:.3f}, {:.3f}, {:.3f})'.format(
i+1, centers[i][0], centers[i][1], centers[i][2]))
```
在这个修改后的代码中,我们增加了一个`if`语句来检查`C_coords`数组是否为空,如果为空则输出提示信息,否则执行聚类算法。另外,我们还修改了`n_clusters`的值,使其等于`C_coords`数组的长度和3的较小值,以防止出现`np.random.choice`函数的错误。
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