William_Dong的专栏

首先写一个测试文件testFile.txt内容为abcdefghigk!lmnop;rst testFile2.txt内容为1 2 34 5 6 78 910（1）fopen>> fid=fopen('testFile.txt');>> headline=fgetl(fid);           输出第一行abcd>> headli

关于PCA的介绍和程序使用，请参照下面文章http://blog.youkuaiyun.com/watkinsong/article/details/8234766　[COEFF,SCORE,latent] = princomp(X) returns latent, a vector containing the eigenvalues of the covariance matrix o

Stanford Andrew Ng Machine Learning course.1. Preprocessing

test.txt 文件的内容如下：title: test11 22line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2 line 2

注：C4.5实现部分非原创，乃参考网上程序第一部分：程序执行例子

xlab=[0.01 0.11 10 100];A=[1 2 3 4 50.525591 0.5688976380.612204724 0.5708661420.5708661420.472441 0.4881889760.503937008 0.4960629920.496062992];plot(A(1,:),A(2,:),'-*')

Matlab Code：place={'beijing','tianjing',   'hebei',    'liaoning','shanghai', 'jiangsu', 'zhejiang', 'fujian',  'shandong'  ,'guangdong',  'hainan',   'shanxi',...    'jilin',    'he

M文件打不开，出现一行红色的字“ Undefined function or method 'uiopen' for input arguments of type 'char'.”，而且打开主程序时，出现很多警告信息Warning: D:\Program Files\MATLAB\R2010b\toolbox\local\pathdef.m not found. 解决方法是在Comman

从libsvm官网上的LibSVM Tools(http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/)中下载svdd-3.1工具箱网站原文说：LIBSVM for SVDD and finding the smallest sphere containing all dataSVDD is another type of one-class SV

假设两个实对称矩阵A和B,如果存在一个可逆的矩阵X，XAX'=B,已知A和B,知道怎么用matlab求X?本例中数据如下：A=[0.287402 0 0   0 0.483209 0   0 0 0.000025];B=[0.287402 -0.028039 -0.0000727    -0.028039 0.483209 0.001299    -0.000072

SVM ten-fold cross validation 的时候用并行计算% this is script is for SVM training and testingtic;clcclearallData=dlmread('features_LDA_ratios.txt'); % allData=importdata('experiment1.mat'); % al