randn
Normally distributed random numbers and arrays Syntax Y = randn(n) Y = randn(m,n) Y = randn([m n]) Y = randn(m,n,p,...) Y = randn([m n p...]) Y = randn(size(A)) randn
s = randn('state') Description
The randn function generates arrays of random numbers whose elements are normally distributed with mean 0, variance σ^2 = 1 , and standard deviation σ = 1.
Y = randn(n) returns an n-by-n matrix of random entries. An error message appears if n is not a scalar.
Y = randn(m,n) or Y = randn([m n]) returns an m-by-n matrix of random entries.
Y = randn(m,n,p,...) or Y = randn([m n p...]) generates random arrays.
Y = randn(size(A)) returns an array of random entries that is the same size as A.
randn, by itself, returns a scalar whose value changes each time it's referenced.
s = randn('state') returns a 2-element vector containing the current state of the normal generator. To change the state of the generator: randn('state',s)Resets the state to s. randn('state',0)Resets the generator to its initial state. randn('state',j)For integer j, resets the generator to its jth state. randn('state',sum(100*clock))Resets it to a different state each time.
s = randn('state')返回一个2元素的包含了当前正常generator的行向量，要改变这个gennrator： randn('state',s)重置状态到s，randn('state',0)重置状态到最开始状态，randn('state',j)，对于整数j重置到第j个状态，randn('state',sum(100*clock))每次都重置到不同状态.