psSetProd

Product to use for <code>prod()</code> in PreciceSums blocks<code>long double</code> converts to long double, performs the
multiplication and then converts back.<code>double</code> uses the standard double scale for multiplication.

type

Choose the type of product to use in PreciceSums. These are used in the
PreciceSums <code>prod</code> blocks

Most of the time floating point arithmetic does
approximately the right thing. When adding sums or having products
of numbers that greatly differ in magnitude, the floating point
arithmetic may be incorrect. This package implements the Kahan
(1965) sum <doi:10.1145/363707.363723>, Neumaier (1974) sum
<doi:10.1002/zamm.19740540106>, pairwise-sum (adapted from 'NumPy',
See Castaldo (2008) <doi:10.1137/070679946> for a discussion of
accuracy), and arbitrary precision sum (adapted from the fsum in
'Python' ; Shewchuk (1997)
<http://www.cs.berkeley.edu/~jrs/papers/robustr.pdf>). In addition,
products are changed to long double precision for accuracy, or
changed into a log-sum for accuracy.

Matthew Fidler

PreciseSums

Accurate Floating Point Sums and Products

Raymond Hettinger

Jonathan Shewchuk

Julian Taylor

Nathaniel Smith

NumPy Team 

Python Team 

psSetProd function

Product to use for <code>prod()</code> in PreciceSums blocks

<code>long double</code> converts to long double, performs the
multiplication and then converts back.

<code>double</code> uses the standard double scale for multiplication.

psSetProd: Choose the type of product to use in PreciceSums. These are used in the PreciceSums `prod` blocks

Description

Usage

Arguments

Value