[plt-scheme] More PLT Scheme as an Alternative to Matlab

From: Doug Williams (m.douglas.williams at gmail.com)
Date: Fri Aug 14 11:12:47 EDT 2009

It's the addressing scheme that generates the successive indices for
processing an array (typically a complex vector) when performing an fft.
That's the only use I know of for it, but there may be others.

On Fri, Aug 14, 2009 at 8:58 AM, Grant Rettke <grettke at acm.org> wrote:

> On Thu, Aug 13, 2009 at 11:06 PM, Doug
> Williams<m.douglas.williams at gmail.com> wrote:
> > As far as I know, PLT Scheme currently does all of its calculations in
> > double-precision. But, I can control the stored representation of the
> > underlying representation now. It's that structure than can allow us to
> code
> > efficient butterfly addressing for ffts, etc for the numerical analysis
> > code. We can worry about compiler efficiency in the future.
> What is butterfly addressing?
> There are some search results for it, but nothing obvious stands out.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.racket-lang.org/users/archive/attachments/20090814/9ef5593f/attachment.html>

Posted on the users mailing list.