inner: Matrix Inner Product
In epca: Exploratory Principal Component Analysis

inner

R Documentation

Matrix Inner Product

Description

Calculate the custom matrix inner product z of two matrices, x and y, where z[i,j] = FUN(x[,i], y[,j]).

Usage

inner(x, y, FUN = "crossprod", ...)

Arguments

`x, y`	`matrix` or `Matrix`.
`FUN`	`function` or a `character(1)` name of base function. The function should take in two vectors as input and output a `numeric(1)` result.
`...`	additional parameters for `FUN`.

Value

matrix, inner product of x and y.

Examples

x <- matrix(1:6, 2, 3)
y <- matrix(7:12, 2, 3)
## The default is equivalent to `crossprod(x, y)`
inner(x, y)
## We can compute the pair-wise Euclidean distance of columns.
EuclideanDistance = function(x, y) crossprod(x, y)^2
inner(x, y, EuclideanDistance)

epca documentation built on July 26, 2023, 5:47 p.m.