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Discussion Groups | Matlab DSP | normal random noise with zero mean, variance not equal to 1

Technical discussion about Matlab and issues related to Digital Signal Processing.

  

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normal random noise with zero mean, variance not equal to 1 - mao mu - Apr 2 20:20:00 2004



Hi folks,
How do I generate a random noise with zero mean, variance not equal to 1.
randn() is for zero mean, variance=1 case. Thanks,
Mu






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RE: normal random noise with zero mean, variance not equal to 1 - Jeff Winter - Apr 5 13:19:00 2004

Hi Mu,

Try:

noise = mean + variance*randn();

Regards,
Jeff

=======================
Jeff Winter
Snr Design Engineer
Aeroflex
www.aeroflex.com -----Original Message-----
From: mao mu [mailto:]
Sent: Friday, April 02, 2004 9:20 PM
To:
Subject: [matlab] normal random noise with zero mean, variance not equal
to 1 Hi folks,
How do I generate a random noise with zero mean, variance not equal to 1.
randn() is for zero mean, variance=1 case. Thanks,
Mu _____________________________________
/groups.php3
Yahoo! Groups Links




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RE: normal random noise with zero mean, variance not equal to 1 - Jorge Vega - Apr 5 15:13:00 2004

 
I think it would be:
 
noise = mean + sqrt(variance) * randn();

Regards,
Jorge
===================
Jorge Vega
Santa Fe
ARGENTINA
===================
----- Original Message -----
From: Jeff Winter
To: mao mu
Cc: m...@yahoogroups.com
Sent: Monday, April 05, 2004 10:19 AM
Subject: RE: [matlab] normal random noise with zero mean, variance not equal to 1

Hi Mu,

Try:

noise = mean + variance*randn();

Regards,
Jeff

=======================
Jeff Winter
Snr Design Engineer
Aeroflex
www.aeroflex.com-----Original Message-----
From: mao mu [mailto:m...@yahoo.com]
Sent: Friday, April 02, 2004 9:20 PM
To:
Subject: [matlab] normal random noise with zero mean, variance not equal
to 1Hi folks,
How do I generate a random noise with zero mean, variance not equal to 1.
randn() is for zero mean, variance=1 case. Thanks,
Mu_____________________________________
/groups.php3
Yahoo! Groups Links

_____________________________________
/groups.php3
Yahoo! Groups Links 


(You need to be a member of matlab -- send a blank email to matlab-subscribe@yahoogroups.com )

RE: normal random noise with zero mean, variance not equal to 1 - Jeff Winter - Apr 5 16:31:00 2004

Jorge,
You think correct.  My mistake.
 
Jeff
-----Original Message-----
From: Jorge Vega [mailto:j...@ceride.gov.ar]
Sent: Monday, April 05, 2004 4:13 PM
To: j...@aeroflex.com; mao mu
Cc: m...@yahoogroups.com
Subject: RE: [matlab] normal random noise with zero mean, variance not equal to 1

 
I think it would be:
 
noise = mean + sqrt(variance) * randn();

Regards,
Jorge
===================
Jorge Vega
Santa Fe
ARGENTINA
===================
----- Original Message -----
From: Jeff Winter
To: mao mu
Cc: m...@yahoogroups.com
Sent: Monday, April 05, 2004 10:19 AM
Subject: RE: [matlab] normal random noise with zero mean, variance not equal to 1

Hi Mu,

Try:

noise = mean + variance*randn();

Regards,
Jeff

=======================
Jeff Winter
Snr Design Engineer
Aeroflex
www.aeroflex.com-----Original Message-----
From: mao mu [mailto:m...@yahoo.com]
Sent: Friday, April 02, 2004 9:20 PM
To:
Subject: [matlab] normal random noise with zero mean, variance not equal
to 1Hi folks,
How do I generate a random noise with zero mean, variance not equal to 1.
randn() is for zero mean, variance=1 case. Thanks,
Mu_____________________________________
/groups.php3
Yahoo! Groups Links

_____________________________________
/groups.php3
Yahoo! Groups Links 


_____________________________________
/groups.php3


(You need to be a member of matlab -- send a blank email to matlab-subscribe@yahoogroups.com )

RE: normal random noise with zero mean, variance not equal to 1 - PRADEEP RAGOTHAMAN - Apr 7 13:19:00 2004

Hi!
You can use the function "normrnd" to generate random numbers from a
distribution with specified mean and variance!
cheers,
Pradeep.

--------- Original Message ---------
DATE:
Mon, 5 Apr 2004 17:31:06 
From: "Jeff Winter"
<j...@aeroflex.com>
To: "Jorge Vega"
<j...@ceride.gov.ar>, "mao mu" <m...@yahoo.com>
Cc: <m...@yahoogroups.com>

Jorge,
You think correct.  My mistake.
 
Jeff
-----Original Message-----
From: Jorge Vega [mailto:j...@ceride.gov.ar]
Sent: Monday, April 05, 2004 4:13 PM
To: j...@aeroflex.com; mao mu
Cc: m...@yahoogroups.com
Subject: RE: [matlab] normal random noise with zero mean, variance not equal to 1

 
I think it would be:
 
noise = mean + sqrt(variance) * randn();

Regards,
Jorge
===================
Jorge Vega
Santa Fe
ARGENTINA
===================
----- Original Message -----
From: Jeff Winter
To: mao mu
Cc: m...@yahoogroups.com
Sent: Monday, April 05, 2004 10:19 AM
Subject: RE: [matlab] normal random noise with zero mean, variance not equal to 1

Hi Mu,

Try:

noise = mean + variance*randn();

Regards,
Jeff

=======================
Jeff Winter
Snr Design Engineer
Aeroflex
www.aeroflex.com-----Original Message-----
From: mao mu [mailto:m...@yahoo.com]
Sent: Friday, April 02, 2004 9:20 PM
To:
Subject: [matlab] normal random noise with zero mean, variance not equal
to 1Hi folks,
How do I generate a random noise with zero mean, variance not equal to 1.
randn() is for zero mean, variance=1 case. Thanks,
Mu_____________________________________
/groups.php3
Yahoo! Groups Links

_____________________________________
/groups.php3
Yahoo! Groups Links 


_____________________________________
/groups.php3
_____________________________________
/groups.php3



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