set.seed

> x=rnorm(5)
> x
[1]  1.1017795  0.7557815 -0.2382336  0.9874447  0.7413901


> y=rnorm(5)
> y
[1]  0.08934727 -0.95494386 -0.19515038  0.92552126  0.48297852

--------------------------------------------------------------------------

> set.seed(10)
> x=rnorm(5)
> x
[1]  0.01874617 -0.18425254 -1.37133055 -0.59916772  0.29454513

> set.seed(10)
> y=rnorm(5)
> y
[1]  0.01874617 -0.18425254 -1.37133055 -0.59916772  0.29454513

------------------------------------------------------------------------------

> set.seed(35)
> x=rnorm(5)
> x
[1]  1.06512533  0.13288118 -0.03404401 -0.04497635  3.33783786

> set.seed(35)
> y=rnorm(5)
> y
[1]  1.06512533  0.13288118 -0.03404401 -0.04497635  3.33783786

set.seed

原文：http://www.cnblogs.com/wwxbi/p/4637647.html