Dear colleagues,
thank you so much for your help.
Hans, I think the Remez algorithm is what I need. I will brush up on
fortran language.
Ravi, thanks anyway, I appreciated.
All the best,
Patrizio
On Tue, May 18, 2010 at 12:10 PM, Hans W Borchers
wrote:
>
> I guess you may be looking for the R
I guess you may be looking for the Remez algorithm. AFAIK there is no
implementation in one of the R packages. You can find FORTRAN code in the
Collected Algorithms of the ACM (no. 604) which probably could be called
from R.
There appears to exist a discrete, equi-distant(?) version as function
'
.
Is this helpful?
I am not sure if there are better algorithms in some R packages.
Ravi.
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of Patrizio Frederic
Sent: Monday, May 17, 2010 5:53 PM
To: r-help@r-project.org
Subject: [R] best
Dear R-users,
I learned today that there exists an interesting topic in numerical
analysis names "best polynomial approximation" (BSA). Given a function
f the BSA of degree k, say pk, is the polynomial such that
pk=arginf sup(|f-pk|)
Although given some regularity condition of f, pk is unique, p
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