self_loop=True, symmetric=True
时间: 2023-05-21 22:02:28 浏览: 93
这是一个关于图的属性的问题,self_loop=True表示图中允许存在自环,即一个节点可以与自己相连;symmetric=True表示图中的边是对称的,即如果节点A与节点B相连,则节点B也与节点A相连。
相关问题
def create_laplacian_dict(self): # 拉普拉斯字典 def symmetric_norm_lap(adj): # rowsum = np.array(adj.sum(axis=1)) d_inv_sqrt = np.power(rowsum, -0.5).flatten() d_inv_sqrt[np.isinf(d_inv_sqrt)] = 0 d_mat_inv_sqrt = sp.diags(d_inv_sqrt) norm_adj = d_mat_inv_sqrt.dot(adj).dot(d_mat_inv_sqrt) return norm_adj.tocoo() def random_walk_norm_lap(adj): # 传入邻接矩阵 rowsum = np.array(adj.sum(axis=1)) # 行总和 d_inv = np.power(rowsum, -1.0).flatten() d_inv[np.isinf(d_inv)] = 0 d_mat_inv = sp.diags(d_inv) norm_adj = d_mat_inv.dot(adj) return norm_adj.tocoo() # 归一化的邻接稀疏矩阵 if self.laplacian_type == 'symmetric': # 解释器默认的是random—walk norm_lap_func = symmetric_norm_lap elif self.laplacian_type == 'random-walk': norm_lap_func = random_walk_norm_lap # 拉普拉斯的功能就用这个 else: raise NotImplementedError self.laplacian_dict = {} for r, adj in self.adjacency_dict.items(): self.laplacian_dict[r] = norm_lap_func(adj) A_in = sum(self.laplacian_dict.values()) self.A_in = self.convert_coo2tensor(A_in.tocoo())
可以看出这段代码是用来创建拉普拉斯字典的。其中使用了两种不同的归一化方法,分别是对称归一化和随机游走归一化。如果选择对称归一化,就使用函数symmetric_norm_lap,如果选择随机游走归一化,就使用函数random_walk_norm_lap。然后遍历邻接矩阵字典,对每一个邻接矩阵都进行相应的归一化操作,最后将所有的归一化邻接矩阵相加,得到A_in,并将其转换为张量格式。
import freq as freq from matplotlib import pyplot as plt import os from scipy.io import loadmat from scipy import signal import pywt from sklearn.model_selection import train_test_split from sklearn import metrics import numpy as np import pywt import numpy as np import matplotlib.pyplot as plt # 导入数据 文件路径 dir_str = r"D:\python\matlab\da" # 此处填文件的路径 file_name = os.listdir(dir_str) file_dir = [os.path.join(dir_str, x) for x in file_name] data_test = [] label_test = [] data_final = {} #label_final = [np.zeros((51, 1))] label_final = np.zeros(1) data_final2 = np.zeros([1, 45000]) ecg_signal = np.zeros([1, 90000]) filtered_ecg_signal = np.zeros([1, 90000]) # 从文件导入数据和标签 for file_origin in file_dir: data = loadmat(file_origin, mat_dtype=True) label_test.append(data['label']) data_test.append(data['ecg']) ecg_signal = data_test[0][0] plt.plot(ecg_signal) plt.show() wp = pywt.WaveletPacket(ecg_signal, 'db4', mode='symmetric', maxlevel=6) coeffs = [] for node in wp.get_level(5, 'approx'): coeffs.append(node.data) mean_coeffs = np.mean(coeffs) std_coeffs = np.std(coeffs) start_pos = np.where(coeffs < mean_coeffs - 0.5 * std_coeffs)[0][-1] end_pos = np.where(coeffs < mean_coeffs - 0.15 * std_coeffs)[0][-1] plt.figure(figsize=(10, 6)) plt.plot(ecg_signal) plt.axvspan(start_pos, end_pos, alpha=0.5, color='red') plt.xlabel('Sample number') plt.ylabel('Amplitude') plt.title('ECG signal with ST segment') plt.show()
好的,根据您提供的代码,我进行了一些修改来修复报错并能够提取所有ST段的问题。修改后的代码如下:
```python
import os
from scipy.io import loadmat
from scipy import signal
import pywt
import numpy as np
import matplotlib.pyplot as plt
# 导入数据
dir_str = r"D:\python\matlab\da" # 此处填文件的路径
file_name = os.listdir(dir_str)
file_dir = [os.path.join(dir_str, x) for x in file_name]
data_test = []
label_test = []
data_final = {}
label_final = np.zeros((len(file_dir), 51))
data_final2 = np.zeros((len(file_dir), 45000))
ecg_signal = np.zeros((len(file_dir), 90000))
filtered_ecg_signal = np.zeros((len(file_dir), 90000))
# 从文件导入数据和标签
for i, file_origin in enumerate(file_dir):
data = loadmat(file_origin, mat_dtype=True)
label_test.append(data['label'])
data_test.append(data['ecg'])
ecg_signal[i] = data_test[i][0]
# 绘制所有ECG信号的图像
plt.figure(figsize=(10, 6))
for i in range(len(file_dir)):
plt.plot(ecg_signal[i], alpha=0.5)
plt.xlabel('Sample number')
plt.ylabel('Amplitude')
plt.title('ECG signals of all data')
# 提取所有ST段
plt.figure(figsize=(10, 6))
for i in range(len(file_dir)):
wp = pywt.WaveletPacket(ecg_signal[i], 'db4', mode='symmetric', maxlevel=6)
coeffs = []
for node in wp.get_level(5, 'approx'):
coeffs.append(node.data)
mean_coeffs = np.mean(coeffs)
std_coeffs = np.std(coeffs)
start_pos = np.where(coeffs < mean_coeffs - 0.5 * std_coeffs)[0][-1]
end_pos = np.where(coeffs < mean_coeffs - 0.15 * std_coeffs)[0][-1]
plt.plot(ecg_signal[i], alpha=0.5)
plt.axvspan(start_pos, end_pos, alpha=0.5, color='red')
plt.xlabel('Sample number')
plt.ylabel('Amplitude')
plt.title('ECG signals with ST segment')
plt.show()
```
修改内容包括:
1. 将 `label_final` 的初始化改为 `np.zeros((len(file_dir), 51))`,使其能够存储所有数据的标签。
2. 将 `data_final2` 的初始化改为 `np.zeros((len(file_dir), 45000))`,使其能够存储所有数据的ECG信号。
3. 将 `ecg_signal`、`filtered_ecg_signal` 的初始化改为 `np.zeros((len(file_dir), 90000))`,使其能够存储所有数据的ECG信号和滤波后的ECG信号。
4. 在绘制所有ECG信号的图像时,将 `alpha` 参数设置为 `0.5`,使得多个信号之间不会互相遮盖。
5. 在提取所有ST段时,将绘图部分和提取部分分开,并在绘图部分中添加了绘制原始ECG信号和标记ST段的代码。
希望这次修改能够帮到您,如果您还有任何问题,请随时提出。
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