Dear Ravi:
Thanks for pointing out the homotopy methods. Coming from Mathematics I was
always considering SINGULAR for such a task which is also providing results
when the solution set is not isolated points, but an algebraic variety.
For single points, homotopy methods appear to be an effectiv
.@r-project.org] On
Behalf Of Uwe Ligges
Sent: Tuesday, May 12, 2009 9:23 AM
To: John C Nash
Cc: r-help@r-project.org
Subject: Re: [R] newtons method
John C Nash wrote:
> Finding polynomial roots is not a problem where one wants a quick and
> dirty code. There are a lot of pitfalls, espec
Subject: Re: [R] newtons method
To: Kon Knafelman
Cc: r-h...@stat.math.ethz.ch
Message-ID: <4a093d93.1020...@statistik.tu-dortmund.de>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Kon Knafelman wrote:
> Hi,
> > Does anyone know how to code newton's method for f
not be aware that optim() is contra-recommended for functions of 1 variable, which seems to be the problem here. But there is
?polyroot
JN
Message: 130
Date: Tue, 12 May 2009 11:12:51 +0200
From: Uwe Ligges
Subject: Re: [R] newtons method
To: Kon Knafelman
Cc: r-h...@stat.math.ethz.ch
Message
Kon Knafelman wrote:
Hi,
Does anyone know how to code newton's method for finding the roots of
polynomial functions? im not sure whether i need to do this manually, or just
code something with a loop to stop when it gets to the desired result
See ?optim for optimization methods.
Uwe Ligge
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