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
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
thanks guys!
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