On 8/28/2011 1:59 PM, Vladimir Vassilevsky wrote:
>
>
> tinkerz wrote:
>
>> C# code from the the internet, I assumed it works
>
> :))))))))
>
> If a code is from the internet, I assume it is a shit.

take a look at FFTW

On Aug 29, 5:29&#4294967295;pm, "tinkerz" <nwoodhamuk@n_o_s_p_a_m.googlemail.com>
wrote:
> Where else can I go to get help on this?
>
> Are there digital control consunlants that can help by sending valid code
> for a fee?

There is a crude fft code in the book 'numerical recipies'.

Rune

Where else can I go to get help on this?

Are there digital control consunlants that can help by sending valid code
for a fee?

tinkerz wrote:

> C# code from the the internet, I assumed it works

:))))))))

If a code is from the internet, I assume it is a shit.

I dont have the knowledge to understand the result, I just have the concept

Ok will try and look at the results

On Sat, 27 Aug 2011 10:36:55 -0500, "tinkerz"
<nwoodhamuk@n_o_s_p_a_m.googlemail.com> wrote:

>C# code from the the internet, I assumed it works
>
>My code for Power spectral density is from wiki
>
>FLowpower+=(Math.Pow(data[index],2)*index)+(Math.Pow(data[index+1],2)*index);	
>
>This may be the problem, I would like power at each frequency and the total
>power.
>
>to compare the power of the lower half to the upper half

You can test the FFT and your integration of it by giving it signals
with known spectra and comparing the results.   e.g., sine waves at
various frequencies, combinations thereof, etc.   You should be able
to isolate whether the FFT is the problem or something else.


Eric Jacobsen
http://www.ericjacobsen.org
http://www.dsprelated.com/blogs-1//Eric_Jacobsen.php

C# code from the the internet, I assumed it works

My code for Power spectral density is from wiki

FLowpower+=(Math.Pow(data[index],2)*index)+(Math.Pow(data[index+1],2)*index);	

This may be the problem, I would like power at each frequency and the total
power.

to compare the power of the lower half to the upper half

On Sat, 27 Aug 2011 05:45:57 -0500, "tinkerz"
<nwoodhamuk@n_o_s_p_a_m.googlemail.com> wrote:

>Still trying find someone who can consult me on this, ant suggestions of
>where to go 
>
>thanks

How did you test your FFT to assure that it is working correctly?
What happens when you provide a sine wave at the input at various
frequencies?


Eric Jacobsen
http://www.ericjacobsen.org
http://www.dsprelated.com/blogs-1//Eric_Jacobsen.php

Still trying find someone who can consult me on this, ant suggestions of
where to go 

thanks