Obtaining same values at avery simulation using rand function

I'm building some simulations with matlab and I use rand function. I would obtain at every run, the same results. I read somewhere I have to set the seed of rand function. I tried using

s = RandStream('mcg16807', 'seed', 0)
RandStream.setGlobalStream(s);

but it didn't work.Maybe I made some mistake.

Answer 1

[Wayne King]

I think you should use the newer rng

    rng default;
    x = randn(100,1);
    rng default
    y = randn(100,1);
    max(abs(x-y))

x and y are the same sequence.

In general, you can capture the random generator settings and resuse them

   S = rng;
   x = randn(100,1);
   rng(S)
   y = randn(100,1);

Answer 2

[Azzi Abdelmalek]

 y=rand(1,100);
 save file y

%when you need y

load file

Answer 3

[Oleg Komarov]

You can use rng()

rng(1)
rand(1,5)

rng(1)
rand(1,5)

Or with your approach:

s = RandStream('mcg16807', 'seed', 0);
RandStream.setGlobalStream(s);
rand(1,5)

s = RandStream('mcg16807', 'seed', 0);
RandStream.setGlobalStream(s);
rand(1,5)