matlab 中抽取随机数的函数

设取值区间为[a,b]，则要在此区间选取一个随机数，程序为：

a=rand()*(b-a)+a

若要求随机数是整数，则程序为：

a=ceil(rand()*(b-a))+a

这样即可！！！

help rand

RAND Uniformly distributed random numbers.
RAND(N) is an N-by-N matrix with random entries, chosen from
a uniform distribution on the interval (0.0,1.0).
RAND(M,N) and RAND([M,N]) are M-by-N matrices with random entries.
RAND(M,N,P,...) or RAND([M,N,P,...]) generate random arrays.
RAND with no arguments is a scalar whose value changes each time it
is referenced. RAND(SIZE(A)) is the same size as A.

RAND produces pseudo-random numbers. The sequence of numbers
generated is determined by the state of the generator. Since MATLAB
resets the state at start-up, the sequence of numbers generated will
be the same unless the state is changed.

S = RAND('state') is a 35-element vector containing the curre