DIGITAL

Principal Component Analysis for Large Matrix

bp网络训练工具箱适合新手学习和使用很有好处(Bp neural network training kit for beginners learn and use is very good )

svm matlab标准模板，共初学者使用

this code helps to understance DSSS direct seq. spread spectrum. in comm.

hread read header of a RINEX 3.01 file and outputs position, the list of observation types and the list of observation .

改进的群体智能算法，简称PSO算法，包括C和matlab两种版本(Improved swarm intelligence algorithm, referred to as PSO algorithm, including two versions of C and matlab)

滤波器与伪彩色变换， 1。一个通用的高通、低通、带通和带阻滤波器函数 2。又分别实现理想、巴特沃思和指数等滤波形式 3。伪彩色处理 内附设计文档。(Filter and pseudo-color transformation, 1. A common high-pass, low pass, band pass and band stop filter function 2. Respectively realize the ideal, Butterworth and index filtering form 3. Pseudo-color handle enclosing the design documents.)

鱼群算法的matlab工具箱，可在matlab中设定路径进行使用(yuqunsuanfa tool for matlab, fish swarm algorithm matlab toolbox)

数据统计学习中的knn算法，实现对多组数据的交叉验证(Statistics Learning knn algorithm to achieve the multi-group cross-validation data)

生成一个采样频率2000，由50Hz、120Hz、200Hz正弦信号以及噪声信号组成的数字信号，滤掉150Hz>f>100Hz的频率，计算并显示滤波前后的原始数据波形以及功率谱密度。(A sampling frequency of 2000, a digital signal composed of 50Hz, 120Hz, 200Hz sine and noise signals, is generated to filter out the frequency of 150Hz>f>100Hz and to calculate and display the original data waveforms and the power spectral density before and after the filtering.)