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Re: Legendre polynomial documentation
- From: Brian Gough <bjg at gnu dot org>
- To: M Joonas Pihlaja <jpihlaja at cc dot helsinki dot fi>
- Cc: gsl-discuss at sources dot redhat dot com
- Date: Tue, 10 Feb 2009 14:23:06 +0000
- Subject: Re: Legendre polynomial documentation
- References: <Pine.OSF.4.61.0902090649430.467394@sirppi.helsinki.fi>
At Mon, 9 Feb 2009 07:38:21 +0200 (EET),
M Joonas Pihlaja wrote:
> 1) The _array function documentation uses the absolute value |m|
> as the lower bound of the array indices yet also specifies m
> >= 0. Why the absolute value if negative m aren't allowed after
> all?
Although it's not implemented, I expect there was an intention to
extend the function to include negative m at some point.
> 2) The docs say the _deriv_array functions compute "optionally
> their derivatives", which made me think that the
> result_deriv_array parameter could be passed in as NULL if one
> didn't need the derivatives. Turns out that's not what it meant.
> :) The phrasing could be a little bit more explicit IMHO.
Ok, I've changed the wording to avoid the confusion.
--
Brian Gough