dsub: In-place vector subtraction

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

In-place vector subtraction

Description

Updates 'Y' by subtracting 'X', i.e. Y := Y - X.

Usage

dsub(N = NULL, X, INCX = 1L, Y, INCY = 1L)

Arguments

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

Value

Invisibly returns the modified 'Y'.

Examples

x <- 1:4
y <- rep(10, 4)
dsub(X = x, Y = y)
y

bigalgebra documentation built on Sept. 9, 2026, 5:12 p.m.