[Edu-sig] Jsoftware, PDF geometry animations (ReportLab?)

kirby urner kirby.urner at gmail.com
Fri May 15 19:19:38 CEST 2009

Speaking of function args, this recent thread with another guy in
Canada (you know him Andre?). :)

You'll find me writing about J going way back in this very archive,
more recently joined by Ed Cherlin in singing its praises.

For those of you looking for a way cool use of Python's ReportLab, I
so far have permission to release this one example "PDF flipbook"
showing how geometry concepts might be communicated using this simple
animation technique:


I've been sharing this as a teaser with Software Association of Oregon
as well, knowing Ron has a lot more where that came from (I'm suppose
to download a half-gig PDF next time in Pauling House for a bored er
board meeting).


---------- Forwarded message ----------
From: kirby urner <kirby.urner at gmail.com>
Date: Tue, May 12, 2009 at 1:52 PM
Subject: Re: Arg names in J
To: Gilles Kirouac
Cc: kirby at 4dsolutions.net

Thanks, I might keep the old notation, as that's what matches the
historical date stamp on my writing, don't want to pretend to
clairvoyance, however I do have more current writing suggesting we
form closer ties with the J-software community, owing to our shared
interest in having computer languages for math teaching.

http://www.4dsolutions.net/presentations/p4t_notes.pdf is some of my
most current thinking on this, note Iverson is front and center, with
B. Fuller on the last page (rarely cited by 1900s authors but a
contemporary favorite in some circles), emerging links to Wolfram
(whom Kenneth didn't get along with especially -- never met the man


On Tue, May 12, 2009 at 1:34 PM, Gilles Kirouac <gkirouac at myriade.ca> wrote:
> Kirby
>  In a recent thread of the J forum, someone mentioned your work
> ( http://www.jsoftware.com/pipermail/chat/2009-May/001811.html ).
>  I recall very well your name in the forum a decade or so ago.
>  I looked briefly at your pages and have a suggestion following
> the evolution of J. Since version 6.01 of J, names x., y. (and
> others) are replaced by x and y in user definitions
> (http://www.jsoftware.com/help/user/previous601.htm). Thus where
> you have explicit defs (v.g. Lecture Four on Bernouilli Numbers),
> a note or adjustment would be welcome. There is a global option
> to ease the transition, see 9!:48 and 9!:49 with V6.01 and V6.02.
>  Regards,
>  ~ Gilles, Québec, Canada

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