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[
GDI-Bitmap
]
principal_components
Description:
PCA = Principal Component Analysis PDF document. Learn it
Platform:
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Size:
91136
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Author:
selamicik
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Hits:
[
AI-NN-PR
]
machine-learning_PCA
Description:
环境为winpython 32bit 2.7.5.3 p = PCA() print u"均值化后的数据集为:",p.dataset( H:\\PCA_test.txt ) print u"协方差矩阵为:",p.COV() print u"特征向量为:",p.eig_vector()[1] tt = p.pc(dim=1) print "tt:",tt print u"新的维度数据集",tt[1]- """ Principal components analysis,PCA,COV,eig,eig vector Parameters¶ : path:数据集的存放路径 dim : 数据降维后的维度数 Attribute: means_data : 原数据- 原数据均值化 m : 数据集的行数 n :数据集的列数 cov_matrix : 协方差矩阵 eig_vectors : 协方差矩阵的特征向量 eig_value : 协方差矩阵求得的特征值 cum_P : 排序后的特征值, 累积百分比计算 Method: PCA.dataset():数据集导入, return:means_data,array(m,n) PCA.cov_matrix:协方差矩阵计算, retrn:cov_matrix,array(n,n) PCA.eig_vector:特征值和特征向量计算, return:(eig_value, eig_vectors),(array(1xn),array(n,n)) PCA.pc:降维后的数据集计算, return:data_rescaled,array(m,dim), defaut:dim=2 """
Platform:
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Size:
2048
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Author:
hhkk
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Hits:
[
matlab
]
PCR
Description:
多变量Y的主成分回归。 格式: [t,p,b,ssq,eigs] = pcr(x,y,pc)- PCR Principal components regression for multivariate y.The I/O format is: [t,p,b,ssq,eigs] = pcr(x,y,pc)
Platform:
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Size:
1024
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Author:
chenly
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