Hi David,
I believe &random is the seed and not to be confused with the random
sequence you would get if you use the "?" operator. &random probably gets
its initial value using the system clock with some simple math. That is why
you have numbers (seeds) that are all clustered together since probably you
ran the program several times around the same clock. If you want the same
sequence to be repeated, set &random at program start up to a specific
value, zero for example, but if you want random numbers you can do
something like
?x # where x is 10^6 for example to get numbers in the range of [0 :
10^6-1 ]
# (have to double check if I got the boundaries right)
In any case, the Unicon book seems to be inconsistent about whether the
value of &random is "randomly" set at start up or not. I believe it is.
Jafar
On Thu, Feb 2, 2012 at 3:59 PM, David Gamey <[email protected]> wrote:
> Hi Folks,
>
> I know the built-in PRNG is a bit quirky and as I understand it Unicon
> departed from Icon by randomizing it initially (although UB3/Sesrit
> contradicts this).
>
> If I run this several times on Win7/x64 UniconV12:
>
> procedure main();write("&random=",&random);end
>
> I get only minor variations:
>
> &random=20122651
> &random=20122851
> &random=20123251
> &random=20123351
> &random=20123451
> &random=20122961
> &random=20123161
> &random=20123261
> &random=20123361
> &random=20123461
>
> Does anyone have any idea what is supposed to happen?
>
> This doesn't help much for testing (fixed &random) or for simulation
> (random &random)
>
> David
>
>
>
>
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