Matlab中rand('state',s)和rand('state',0)表示什么意思？

adogpp

它们是表示什么意思呀，我在论坛中搜索过相似的帖子，可是还是不明白，谁能帮我举例说明一下，非常感谢！
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yin123

) C: N$ i- w* z4 iRAND('state',0) resets the generator to its initial state.
$ R4 R5 a' U2 g2 m0 g' FRAND('state',J), for integer J, resets the generator to its J-th state.
RAND('state',J) and RAND('state',S) cause the MATLAB 5 generator to be used.
help 里面解释
( k" }3 t3 `: `! _8 ?  urand('state',s)Resets the state to s.
4 E: m6 ?; t% z' a+ y; @- p8 Q* Wrand('state',0)Resets the generator to its initial state.
rand('state',j)For integer j, resets the generator to its j-th state.
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NingW

( e% U- m: t3 ~& H$ d' Crand('state',s)表示随机产生数的状态state，一般情况下不用指定状态。但是有的书籍作者为了让读者能够看到和他书本的同样结果，采用了设置state，rand('state',0)作用在于如果指定状态，产生随机结果就相同了。