Message-ID: <Pine.GSO.4.56.0902252047110.1651@laurel.few.vu.nl>
Date: 2009-02-25T19:56:41Z
From: Katharine Mullen
Subject: Gradient function for optim.
In-Reply-To: <20090225135659.HJIR1.1421572.root@mp18>
see the fmingr function in src/main/optim.c
(https://svn.r-project.org/R/trunk/src/main/optim.c)
On Wed, 25 Feb 2009 rkevinburton at charter.net wrote:
> I have read that when the gradient function is not supplied (is null)
> then first order differencing is used to find the differential. I was
> trying to track down this for my own information but I run into
> .Internal(optim.....). I was not sure where to look next to see the
> function that is automatically supplied for the gradient.
>
> Thank you.
>
> Kevin
>
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