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% 调用示例: [reduced_data, eigenvalues, explained_variance, transformation_matrix] = main(data, option);
输出结果说明:
reduced_data: m×k降维后数据矩阵,每行代表样本在主成分空间中的投影eigenvalues: n×1降序排列的特征值向量explained_variance: k×1各主成分方差解释比例向量transformation_matrix: n×k从原始空间到主成分空间的线性变换矩阵