psSetSum

Sum type to use for <code>psSum</code> and <code>sum()</code> in
 PreciceSums code blocks.<code>pairwise</code> uses the pairwise sum (fast, default)<code>fsum</code> uses Python's fsum function (most accurate)<code>kahan</code> uses kahan correction<code>neumaier</code> uses Neumaier correction<code>c</code> uses no correction, bud default/native summing

type

Choose the types of sums to use in PreciceSums. These are used in the
PreciceSums <code>sum</code> blocks and the <code>psSum</code> function

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 

psSetSum function

Sum type to use for <code>psSum</code> and <code>sum()</code> in
 PreciceSums code blocks.

<code>pairwise</code> uses the pairwise sum (fast, default)

<code>fsum</code> uses Python's fsum function (most accurate)

<code>kahan</code> uses kahan correction

<code>neumaier</code> uses Neumaier correction

<code>c</code> uses no correction, bud default/native summing

psSetSum: Choose the type of sums to use for PreciceSums.

Description

Usage

Arguments

Value