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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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MATLAB
利用有限元法计算悬臂梁的实例,包含详细说明,适合用于课程设计。(Using the finite element method to calculate the cantilever instance, contains a detailed description, suitable for curriculum design.)
- 2014-10-04 08:37:38下载
- 积分:1
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bisect
该function文件可以利用二分法求解方程的数值解,其中有例子(The function files can be used to solve equations numerical solution of the dichotomy, of which examples)
- 2010-10-10 11:35:26下载
- 积分:1
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chebyshevnihe
说明: 数值分析中的chebyshev拟合程序,学习数值分析的同学可以参考参考(Numerical Analysis of chebyshev fit program, students study and numerical analysis can refer to reference)
- 2011-03-24 15:07:01下载
- 积分:1
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juzhenganjian
矩阵按键程序,用的是C。本人还是学生,做得不好请大家多多指教(Matrix button procedure is used in C. I am still a student, doing a lot of bad advice please)
- 2009-05-07 22:38:32下载
- 积分:1
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1
说明: 一维黎曼问题,一维问题,即激波管问题,是一个典型的一维可压缩无黏气体动力学问题,并有 解析解。对它采用二阶精度两步差分格式进行数值求解。(Riemann problem, One dimensional problem, the shock tube problem, is a typical one-dimensional compressible non viscous gas dynamic problem with analytic solutions. It is solved numerically by two order two step difference scheme.)
- 2018-04-29 14:56:36下载
- 积分:1
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pca
说明: PCA主成分分析的标准MATLAB程序,可通用,非常有效(PCA principal component analysis of the standard MATLAB procedures, can be universal, very effective)
- 2008-10-13 01:48:40下载
- 积分:1
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stochastic-computation
TGM.m \传统的Galerkin方法
MD.m \时滞惯性流形方法
brownian.m \演示布朗运动
randomwalk.m \ 演示随机游走
tumor.m \ 演示tumor演化(TGM.m traditional Galerkin method MD.m Delays inertial manifold method brownian.m demo Brownian motion randomwalk.m demo random walk tumor.m demo tumor evolution)
- 2013-08-28 18:00:23下载
- 积分:1
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数字信号处理上机作业
说明: 数字信号处理DSP中,DFT离散傅里叶变换等上机作业。(In digital signal processing DSP, DFT discrete Fourier transform.)
- 2020-05-10 20:54:48下载
- 积分:1
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PID-algrithm
对于PID算法给予了通俗易懂的讲解,有利于初学者快速掌握PID的要领(I give the PID algorithm the understandable explanation,which will help beginners to quickly master the PID essentials)
- 2012-12-21 15:21:32下载
- 积分:1