Matrix Subtraction of Two Vectors

Expands two vectors into matrices and computes element-wise subtraction, creating a full difference matrix where each element (i,j) equals v1[i] - v2[j].

Usage

matrixSub(v1, v2)

Arguments

v1

Numeric vector. Optionally can have names which will be used as row names.

v2

Numeric vector. Optionally can have names which will be used as column names.

Value

A matrix of dimensions length(v1) x length(v2) containing all pairwise differences. Row and column names are preserved if present in the input vectors.

Examples

a <- 3:8
b <- 1:2
matrixSub(a,b)
#>      [,1] [,2]
#> [1,]    2    1
#> [2,]    3    2
#> [3,]    4    3
#> [4,]    5    4
#> [5,]    6    5
#> [6,]    7    6