[Octave-patch-tracker] [patch #10067] Improvement of funm (linear algebra package)

[Simon]

URL:
  <https://savannah.gnu.org/patch/?10067>

                 Summary: Improvement of funm (linear algebra package)
                 Project: GNU Octave
            Submitted by: sim79
            Submitted on: Fri 14 May 2021 10:23:10 PM UTC
                Category: Forge : other
                Priority: 3 - Low
                  Status: None
                 Privacy: Private
             Assigned to: None
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hello, 

this (experimental) package contains the implementation of function funm with
the Schur Parlett algorithm from N.J. Higham, Functions of Matrices, 2008. In
order to avoid conflicts with the existing funm implementation the function is
named funm2. There is a proposal on the Octave Projects
<https://wiki.octave.org/Projects> page which is related to this package. Only
exp,sin,cos,sinh and cosh are supported by default because their k-th
derivatives can be calculated easily. 

I tested the package with Octave 7.0.0 on Ubuntu 20.4. 

Future TODO list
*) implement k-th derivative for functions other than exp,sin,cos,sinh and
cosh
*) move declarations of LAPACK procedures in trexc.cc to file
lo-lapack-proto.h
*) check whether funm2 can be used for functions whose Taylor series doesn't
have 
   an infinite radius of convergence. 
*) move funm2 to linear algebra package

Simon



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File Attachments:


-------------------------------------------------------
Date: Fri 14 May 2021 10:23:10 PM UTC  Name: funm2-1.0.0.tar.gz  Size: 19KiB  
By: sim79

<http://savannah.gnu.org/patch/download.php?file_id=51434>

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