学python学费大概多少_推广赚钱的项目_在线培训系统app_南京疫情最新情况

pca输出主成分 

def pca(data, k):# TODO: 实现 PCA 的逻辑,输出前k个主成分mean=np.mean(data,axis=0)std=np.std(data,axis=0)data_std=(data-mean)/stdcov=np.cov(data_std.T)evalue,evector=np.linalg.eig(cov)sorted_id=np.argsort(evalue)[::-1]top_k_id=sorted_id[:k]principal_components=evector[:,top_k_id]return principal_components

 .json文件的导入

    with open(file_name,'r') as file:data_json=json.load(file)

.html文件的导入

    with open(file_name,'r') as file:data_html=file.read()