How to generate white guassian noise, given standard deviation.

Hi all, With due respect, I wanna ask that if i am given standard deviation only, what i should do to generate white Gaussian noise. And I want to add this noise in a 1D data. Thanks in anticipation :) take care

Answer 1

[James Tursa]

doc randn

See section on Random Numbers from Normal Distribution with Specific Mean and Variance

[Talha Khan]

Thanks a lot. It is really helpful :)

[Talha Khan]

the noise generated by randn is white Gaussian noise??

[James Tursa]

E.g., you can read this link for a description of Gaussian white noise and normally distributed data

http://en.wikipedia.org/wiki/White_noise

[Image Analyst]

Talha, yes it is. Each sample you get from randn() is an independent sample - there is no correlation between adjacent samples in time or space so it's white.

[Talha Khan]

Thanks, Image Analyst :) (y) and James Tursa