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From: Artur Racu on 26 May 2010 04:19
hy all,

so i hope what my problem is clear to everyone, i need to generate a WGN(actually i need those values becouse i want to implement them in Eurostag),

thank you,

Artur
From: David Young on 26 May 2010 05:04
I don't know what Eurostag is, but in Matlab the function I would use to generate an approximation to white Gaussian noise is randn.
From: Artur Racu on 26 May 2010 05:22
"David Young" <d.s.young.notthisbit(a)sussex.ac.uk> wrote in message <htio66$ch9$1(a)fred.mathworks.com>...
> I don't know what Eurostag is, but in Matlab the function I would use to generate an approximation to white Gaussian noise is randn.

Eurostag is a tool used for dynamic computation of power systems, i want to creat a signal(white gausian noise) so i can make a disturbance in power system and after to analyse different things;

for example n=randn(10) if you take the mean of each column you will see that the mean is not zero(for white noise the main roule is t have the mean zero)

could you please help me on that,

thank you
From: Artur Racu on 26 May 2010 05:28
"Artur Racu" <arturracu(a)yahoo.com> wrote in message <htilhq$m70$1(a)fred.mathworks.com>...
> hy all,
>
> so i hope what my problem is clear to everyone, i need to generate a WGN(actually i need those values becouse i want to implement them in Eurostag),
>
> thank you,
>
> Artur

more details--during 15s i need to generate a white gaussian noise;

please help; any ideas are well recieved,

Artur
From: TideMan on 26 May 2010 05:29
On May 26, 9:22 pm, "Artur Racu" <arturr...(a)yahoo.com> wrote:
> "David Young" <d.s.young.notthis...(a)sussex.ac.uk> wrote in message <htio66$ch...(a)fred.mathworks.com>...
> > I don't know what Eurostag is, but in Matlab the function I would use to generate an approximation to white Gaussian noise is randn.
>
> Eurostag is a tool used for dynamic computation of power systems, i want to creat a signal(white gausian noise) so i can make a disturbance in power system and after to analyse different things;
>
> for example n=randn(10) if you take the mean of each column you will see that the mean is not zero(for white noise the main roule is t have the mean zero)
>
> could you please help me on that,
>
> thank you

Oh, don't be so silly!!
Of course the mean will be different from zero with only 10 numbers.
Now try this:
mean(randn(1000000,1))
Is that close enough to zero for you?
If not, try this:
mean(randn(100000000,1))

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