[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Bug-gsl] [bug #41759] DHT manual

From: Patrick Alken
Subject: [Bug-gsl] [bug #41759] DHT manual
Date: Mon, 03 Mar 2014 01:08:21 +0000
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:27.0) Gecko/20100101 Firefox/27.0


                 Summary: DHT manual
                 Project: GNU Scientific Library
            Submitted by: psa
            Submitted on: Mon 03 Mar 2014 01:08:19 AM GMT
                Category: Documentation
                Severity: 3 - Normal
        Operating System: 
                  Status: None
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any



Dear GSL-manual team,

the manual for the DHT should be updated:

when the scaling factor X is used,
the factor X^2 enters the calculation.
Then, DHT[f](k) calculates
1/(2Pi) int f(x) e^(-i x k) d^2x
for a two dimensional x.
This is not clear mentioned in the documentation.

Moreover, when using the factor X, after a forward and backward 
transformation there enters the factor j_{nu,i}^2 / X^4, NOT only 

This can easily be seen from the article of H.F. Johnson (mentioned in 
the documentation), eq. (13), where DHT calculates always a term as 
given by eq. (12), for forward and backward transform, respectively.

It took me some time to find this out, so it would be nice to update the 
documentation with respect to future readership.
I am willing to help you, if it is not delayed by monthes.

A.Hartel =at= uu.nl


Reply to this item at:


  Message sent via/by Savannah

reply via email to

[Prev in Thread] Current Thread [Next in Thread]