Current global random number stream
stream = RandStream.getGlobalStream
stream = RandStream.getGlobalStream returns
the current global random number stream.
rand, randi, and randn all
rely on the same stream of uniform pseudorandom numbers, known as
the global stream. rand draws
one value from that stream to generate each uniform value it returns. randi draws one uniform value from that
stream to generate each integer value it returns. And randn draws one or more uniform values
to generate each normal value it returns. Note that there are also rand, randi, and randn methods
for which you specify a specific random stream from which to draw
values.
The rng function is a
shorter alternative for many common uses of RandStream.getGlobalStream.