On Jun 25, 3:34&#4294967295;pm, HardySpicer <gyansor...@gmail.com> wrote:
> I am doing some testing of blind source estimation schemes and require
> higher-order statistical noise.
> I only have Gaussian and normal distributions. Is it possible to shape
> these in some way to make a Laplace distribution? (to model speech - I
> know I could use real speech but I want more control over things).
>
> Thanks

What is the difference between Gaussian and normal distributions?

In any system in which a random number generator simulating
a Gaussian random variable is available, surely there is also
a uniform random number generator available? Or are you
absolutely adamant that a Gaussian random variable _must_
be massaged into a Laplacian random variable; just starting
from a uniform random number generator is forbidden?

Dilip Sarwate

On Jun 26, 9:14�am, Piergiorgio Sartor
<piergiorgio.sartor.this.should.not.be.u...@nexgo.REMOVETHIS.de>
wrote:
> On 06/25/2012 10:34 PM, HardySpicer wrote:
>
> > I am doing some testing of blind source estimation schemes and require
> > higher-order statistical noise.
> > I only have Gaussian and normal distributions. Is it possible to shape
> > these in some way to make a Laplace distribution? (to model speech - I
> > know I could use real speech but I want more control over things).
>
> Well, I would like to suggest:
>
> http://en.wikipedia.org/wiki/Laplace_distribution
>
> Where everything you need is explained.
>
> bye,
>
> --
>
> piergiorgio

Indeed it is!! Thanks

On 06/25/2012 10:34 PM, HardySpicer wrote:
> I am doing some testing of blind source estimation schemes and require
> higher-order statistical noise.
> I only have Gaussian and normal distributions. Is it possible to shape
> these in some way to make a Laplace distribution? (to model speech - I
> know I could use real speech but I want more control over things).

Well, I would like to suggest:

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

Where everything you need is explained.

bye,

-- 

piergiorgio

On Monday, June 25, 2012 1:34:01 PM UTC-7, HardySpicer wrote:
> I am doing some testing of blind source estimation schemes and require
> higher-order statistical noise.
> I only have Gaussian and normal distributions. Is it possible to shape
> these in some way to make a Laplace distribution? (to model speech - I
> know I could use real speech but I want more control over things).
> 
> Thanks

By finding the inverse CDF of the Laplace distribution you have a mapping from the uniform random variable to your desired random variable. If you want a source I'll dig up one of my books and put it here. I assume you can generate a uniform random variable as well.

I am doing some testing of blind source estimation schemes and require
higher-order statistical noise.
I only have Gaussian and normal distributions. Is it possible to shape
these in some way to make a Laplace distribution? (to model speech - I
know I could use real speech but I want more control over things).

Thanks