explained_variance_ratio = pca.explained_variance_ratio_ print(explained_variance_ratio)将这个的输出结果行列互换

要将 `explained_variance_ratio` 输出结果的行列互换，您可以使用 NumPy 库中的 `transpose()` 函数。请按照以下步骤进行修改：

1. 导入所需的库：

import numpy as np

2. 对数据进行转置：

explained_variance_ratio_transposed = np.transpose(explained_variance_ratio)

这将对 `explained_variance_ratio` 进行转置操作，将行列互换。

3. 打印结果：

print(explained_variance_ratio_transposed)

这将打印转置后的结果，其中行列已经互换。

请确保已正确导入所需的库，并在代码中添加转置操作。执行完上述代码后，将获得已经行列互换的输出结果 `explained_variance_ratio_transposed`。

相关问题

import pandas as pd import numpy as np import matplotlib.pyplot as plt from sklearn import datasets from mpl_toolkits.mplot3d import Axes3D from sklearn.decomposition import PCA from sklearn.preprocessing import StandardScaler data=pd.read_csv('H:/analysis_results/mean_HN.csv') data.head() x=data.iloc[:,1:7] y=data.iloc[:,6] scaler=StandardScaler() scaler.fit(x) x_scaler=scaler.transform(x) print(x_scaler.shape) pca=PCA(n_components=3) x_pca=pca.fit_transform(x_scaler) print(x_pca.shape) #查看各个主成分对应的方差大小和占全部方差的比例 #可以看到前2个主成分已经解释了样本分布的90%的差异了 print('explained_variance_:',pca.explained_variance_) print('explained_variance_ratio_:',pca.explained_variance_ratio_) print('total explained variance ratio of first 6 principal components:',sum(pca.explained_variance_ratio_)) #将分析的结果保存成字典 result={ 'explained_variance_:',pca.explained_variance_, 'explained_variance_ratio_:',pca.explained_variance_ratio_, 'total explained variance ratio:',np.sum(pca.explained_variance_ratio_)} df=pd.DataFrame.from_dict(result,orient='index',columns=['value']) df.to_csv('H:/analysis_results/Cluster analysis/pca_explained_variance_HN.csv') #可视化各个主成分贡献的方差 #fig1=plt.figure(figsize=(10,10)) #plt.rcParams['figure.dpi'] = 300#设置像素参数值 plt.rcParams['path.simplify'] = False#禁用抗锯齿效果 plt.figure() plt.plot(np.arange(1,4),pca.explained_variance_,color='blue', linestyle='-',linewidth=2) plt.xticks(np.arange(1, 4, 1))#修改X轴间隔为1 plt.title('PCA_plot_HN') plt.xlabel('components_n',fontsize=16) plt.ylabel('explained_variance_',fontsize=16) #plt.savefig('H:/analysis_results/Cluster analysis/pca_explained_variance_HN.png') plt.show()报错unhashable type: 'numpy.ndarray'，如何修改

这个错误通常是由于字典中存在不可哈希对象 (unhashable type)，比如 numpy 数组，而字典的键必须是可哈希的对象。你可以将 numpy 数组转换为列表，然后再保存到字典中，例如：

result={     
    'explained_variance_': pca.explained_variance_.tolist(),
    'explained_variance_ratio_': pca.explained_variance_ratio_.tolist(),
    'total explained variance ratio': np.sum(pca.explained_variance_ratio_)
}

这样就可以避免 unhashable type 错误了。

explained_variance_ratio = pca.explained_variance_ratio_

This variable stores the explained variance ratio of each principal component in the PCA analysis. It is an array of length equal to the number of principal components computed in the analysis. The value of each element represents the proportion of the total variance in the data that is explained by the corresponding principal component. The sum of all elements in the array is equal to 1.0. This information can be used to determine the number of principal components needed to capture a certain percentage of the total variance in the data. For example, if the first two principal components have an explained variance ratio of 0.5 and 0.3, respectively, then these two components capture 80% of the total variance in the data.