随机模拟和统计分析

max,min - 最大，最小值

sum - 求和

mean - 均值

std - 标准差

sort - 排序（升序）

sortrows - 按某一列排序(升序)

rand - [0，1]区间均匀分布随机数

randn - 标准正态分布随机数

randperm - 1...n 随机排列

regress - 线性回归

classify - 统计聚类

*trim - 坏数据祛除

*specrnd - 给定分布律随机数生成

*randrow - 整行随机排列

*randmix - 随机置换

*chi2test - 分布拟合度卡方检验-　Random simulation and statistical analysis　max, min- maximum, minimum　sum- summation　mean- mean　std- standard deviation　sort- (ascending)　sortrows- by a column (ascending)　rand- [ 0,1] uniformly distributed random numbers　randn- standard normal random numbers　randperm- 1 ... n random permutation　regress- Linear Regression　classify- statistical clustering * trim- get rid of bad data * specrnd- given distribution law of the random number generator * randrow- the entire line randomly arranged * randmix- random permutation * chi2test- distribution fit chi-square test