[R] Find zeros of analytic functions
r.hankin at noc.soton.ac.uk
Mon Apr 16 14:32:52 CEST 2007
>> Dear Partecipants to the list,
>> I am Enrico Foscolo, a student of the Faculty of Statistics,
>> University of Bologna,
>> and I am interested under consideration of the search of zeros of
>> one function.
>> I would want to write a code using the software R.
>> I have already read the book "Computing the Zeros of Analytic
>> Functions" (P. Kravanja and M. Van Barel, 2000) that speaks about
>> this problem, computing a Fortran 90 code.
>> Consequently, I would want to ask You if:
>> - already exists a R code,
> I presume you mean analytic functions of a complex argument. Few R
> packages use complex vectors, and none of those few do this to my
If iterative methods are appropriate,
it's perhaps worth pointing out that Newton-Rapheson
works nicely for complex functions.
The "elliptic" package includes function newton.rapheson()
for this, in addition to other utilities for analyzing
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