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PCA算法程序 pca
PCA算法程序设计步骤:
1、去均值
2、计算协方差矩阵及其特征值和特征向量
3、计算协方差矩阵的特征值大于阈值的个数
4、降序排列特征值
5、去掉较小的特征值
6、去掉较大的特征值(一般没有这一步)
7、合并选择的特征值
8、选择相应的特征值和特征向量
9、计算白化矩阵
10、提取主分量
(PCA algorithm programming steps: 1 to mean 2, calculation of covariance matrix and its eigenvalues and eigenvectors 3, the calculation of covariance matrix eigenvalues greater than the threshold number of 4, in descending order of eigenvalue 5, remove the smaller eigenvalue 6, remove the larger eigenvalue (usually not this step) 7, the combined choice of eigenvalues 8, select the appropriate eigenvalues and eigenvectors 9, computing whitening matrix 10, principal component extraction)
- 2021-03-09 13:09:27下载
- 积分:1
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cp
说明: 最小二乘法拟合曲线的一个小程序,采用C++程序,(Least-squares fitting curve C++ program)
- 2012-07-24 12:26:31下载
- 积分:1
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df
说明: 经过个人修改的matlab科学计算程序,供初学者使用(MATLAB scientific computing and visualization simulation literature amended program can achieve numerical conversion between)
- 2012-08-06 19:12:57下载
- 积分:1
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FFT
基因的FFT变换,可以快速得出外显子的位置(Transform FFT of the gene can be quickly drawn to the location of exon)
- 2012-09-24 01:25:39下载
- 积分:1
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A numerical method for analysis of Korres2003
说明: A numerical method for analysis of Korres2003
- 2020-06-18 17:20:02下载
- 积分:1
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test
随机数的产生,枚举嵌套算法求解一元多次方程。按批量处理。(The generation of random Numbers, nested enumeration algorithm monadic equation according to the batch processing for many times)
- 2013-05-18 08:42:15下载
- 积分:1
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FFT842
基二、基四、基八 FFT变化源代码,有详细注解(Second base, the base four or eight FFT-based changes in the source code, detailed comments)
- 2021-02-20 14:09:43下载
- 积分:1
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公约数
说明: 用C语言实现计算两个数字的最大公约数,代码简单简洁,适合初学者学习。(C language is used to calculate the maximum common divisor of two digits. The code is simple and concise. It is suitable for beginners to learn.)
- 2020-06-21 16:20:01下载
- 积分:1
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SQP
本算法是基于数值计算中的SQP编写的MATLAB程序。非常实用的一个小程序。(This algorithm is based on the numerical calculation of SQP written MATLAB program. Very practical one small program.)
- 2020-12-29 10:39:00下载
- 积分:1
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wavelet_fractal_compressor
fractal compression using wavelet
- 2020-06-20 03:20:02下载
- 积分:1