# Anyone know how to interpret Matlab Wavelet info?

Started by March 4, 2013
```I am learning how to use the GUI Wavelet program in Matlab (newbie).

I am working out an example and notice the following graphs labeled :
S, A1, A2, A3, A4, A5 and D1, D2, D3, D4, and D5.

I am performing a level 5 decomposition.  I am sure S = original signal but
what does A1 to A5 and D1 to D5 mean?  I assume its 1 to 5 because its a
level 5 decomposition but I am not sure what A and D stand for.
```
```On Monday, March 4, 2013 1:07:50 PM UTC-6, clutchfft wrote:
> I am learning how to use the GUI Wavelet program in Matlab (newbie). I am working out an example and notice the following graphs labeled : S, A1, A2, A3, A4, A5 and D1, D2, D3, D4, and D5. I am performing a level 5 decomposition. I am sure S = original signal but what does A1 to A5 and D1 to D5 mean? I assume its 1 to 5 because its a level 5 decomposition but I am not sure what A and D stand for.

Average and Detail? A1 - A5 the low-pass coefficients, D1 - D5 the high-pass coefficients?
```
```On Monday, March 4, 2013 11:07:50 AM UTC-8, clutchfft wrote:
> I am learning how to use the GUI Wavelet program in Matlab (newbie).
> ...
> I am not sure what A and D stand for.

Try reading the Mathworks freely available (Google is your friend) Wavelet Toolbox User's Guide at least as far as page 1-23.

Dale B. Dalrymple

```
```>On Monday, March 4, 2013 11:07:50 AM UTC-8, clutchfft wrote:
>> I am learning how to use the GUI Wavelet program in Matlab (newbie).
>> ...
>> I am not sure what A and D stand for.
>
>Try reading the Mathworks freely available (Google is your friend) Wavelet
Toolbox User's Guide at least as far as page 1-23.
>
>Dale B. Dalrymple
>
>

Thanks, it provided a lot of helpful information.
```
```On Mon, 04 Mar 2013 13:07:50 -0600, "clutchfft" <94601@dsprelated>
wrote:

>I am learning how to use the GUI Wavelet program in Matlab (newbie).
>
>I am working out an example and notice the following graphs labeled :
>S, A1, A2, A3, A4, A5 and D1, D2, D3, D4, and D5.
>
>I am performing a level 5 decomposition.  I am sure S = original signal but
>what does A1 to A5 and D1 to D5 mean?  I assume its 1 to 5 because its a
>level 5 decomposition but I am not sure what A and D stand for.

Hi,
you might ask my friend Lee Fugal for help.
Lee's a wavelet guru who uses Matlab.

He's at: lfugal@aol.com

Good Luck,
[-Rick-]
```