cosine: Cosine Similarity

In coop: Co-Operation: Fast Covariance, Correlation, and Cosine Similarity Operations

Description

Compute the cosine similarity matrix efficiently. The function syntax and behavior is largely modeled after that of the cosine() function from the lsa package, although with a very different implementation.

Usage

cosine(x, y, use = "everything", inverse = FALSE)

tcosine(x, y, use = "everything", inverse = FALSE)

Arguments

x	A numeric dataframe/matrix or vector.
y	A vector (when x is a vector) or missing (blank) when x is a matrix.
use	The NA handler, as in R's cov() and cor() functions. Options are "everything", "all.obs", and "complete.obs".
inverse	Logical; should the inverse covariance matrix be returned?

Details

See ?coop-package for implementation details.

Value

The n\times n matrix of all pair-wise vector cosine similarities of the columns.

Author(s)

Drew Schmidt

See Also

sparsity

Examples

x <- matrix(rnorm(10*3), 10, 3)

coop::cosine(x)
coop::cosine(x[, 1], x[, 2])

coop documentation built on Sept. 19, 2021, 5:07 p.m.