Example

> rand(2,4)
        1      0.647     0.0369      0.665  
    0.975      0.333      0.162     0.0847  
> rand(2,4)
    0.204      0.655       0.91      0.299  
    0.167      0.129      0.112      0.265
> srand(1);
> // Reset the seed.
> rand(2,4)
        1      0.647     0.0369      0.665  
    0.975      0.333      0.162     0.0847  
> srand("clock")
        1
> rand(2,4)
    0.366      0.803       0.34     0.0192  
    0.372       0.51      0.362      0.575