Dear Jose Mario and J Forum:
I couldn't understand all your script; but I am curious about the following
excerpt:
NB. Note that we could be even finer grained
NB. with, EG:
NB. ln =. ^.`(1x1&^.)`(1x1 ^. ])
NB. gamma =. 1 {. !`[
NB. dec =. <:`(_1&+) `(-&1) `(_1 + ])`(] - 1:)
NB. LNGAMMAS =: ('@:' <@; <)@,"0/&.> { ln;gamma;<dec
It seems to imply that the delta-x of the D. operator can be specified. Is
this correct? Could I then increase the accuracy of the calculations by
asking J to differentiate over more (and more finely grained) points?
By the way, I've never seen 1x1 as exponential notation. Where in the help
files is that described?
Thanks.
Sincerely,
Leigh
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jose Mario Quintana
Sent: Wednesday, May 09, 2007 9:57 AM
To: 'Programming forum'
Subject: RE: [Jprogramming] Digamma function
> [EMAIL PROTECTED] On Behalf Of Dan Bron
[...]
>
> Here's a script that automatically generates and compares a bunch of
> theoretically-equivalent gammas functions:
>
> http://www.jsoftware.com/svn/DanBron/trunk/environment/generate_j.ijs
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