sumdotpack

Version 1.0.0.0 (5.87 KB) by Alain BARRAUD
qsum & qdot compute quadruple precision sum & dot product, fpsum & fpdot give almost full double.
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Updated 21 Oct 2005

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This small package computes sums and dots product using quadruple precision accumulation or such that allmost full double precision is achieved whatever the condtion number of the computation may be. There are 4 routines qsum, fpsum, qdot & fpdot plus 2 mains for testing purpose.
If symbolic toolbox is available results using symbolic computation is given in the test programs.

This routines look like some Xblas modules and are usually to be used to perform iterative refinement in linear algebra problems. Used mainly for pedagogical purpose.

Cite As

Alain BARRAUD (2024). sumdotpack (https://www.mathworks.com/matlabcentral/fileexchange/8765-sumdotpack), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R13SP1
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes
1.0.0.0