dqddot

Forms the dot product using long-double accumulation to mitigate rounding error.

Provides arithmetic functions for R matrix and 'big.matrix' objects as well as functions for QR factorization, Cholesky factorization, General eigenvalue, and Singular value decomposition (SVD). A method matrix multiplication and an arithmetic method -for matrix addition, matrix difference- allows for mixed type operation -a matrix class object and a big.matrix class object- and pure type operation for two big.matrix class objects.

Frederic Bertrand

bigalgebra

'BLAS' and 'LAPACK' Routines for Native R Matrices and
'big.matrix' Objects

Michael J. Kane

Bryan Lewis

John W. Emerson

dqddot function

<dl><dt>N</dt>
<dd>Optional integer giving the number of elements. Defaults to `length(X)`.</dd>
<dt>X</dt>
<dd>Double-precision vector, matrix or [`bigmemory::big.matrix`] input.</dd>
<dt>INCX</dt>
<dd>Integer stride for traversing `X`.</dd>
<dt>Y</dt>
<dd>Double-precision object updated in place.</dd>
<dt>INCY</dt>
<dd>Integer stride for traversing `Y`.</dd></dl>

Arguments

High-accuracy dot product — dqddot

<dl>

<dt>N</dt>
<dd>Optional integer giving the number of elements. Defaults to `length(X)`.</dd>


<dt>X</dt>
<dd>Double-precision vector, matrix or [`bigmemory::big.matrix`] input.</dd>


<dt>INCX</dt>
<dd>Integer stride for traversing `X`.</dd>


<dt>Y</dt>
<dd>Double-precision object updated in place.</dd>


<dt>INCY</dt>
<dd>Integer stride for traversing `Y`.</dd>

</dl>

dqddot: High-accuracy dot product

Description

Usage

Value

Arguments

Examples