There is a description in the 'Blue Book' (Becker et al, 1988) of when
attributes are supposed to be preserved, and R mostly conforms to it.
This is discussed somewhere relevant in the R documentation: I would
have to search for exactly where, so I leave that to you.
On Wed, 19 Oct 2011, Joh
I've been trying to prepare some wrappers for optimization objective functions
and
gradients that use try() to check for computable functions. I'm also trying to
do scaling
as per optim() so that a number of methods that are available on CRAN and
R-Forge can use
parameter and function scaling. T
