R: Cosine Similarity

cosine {coop} | R Documentation

## Cosine Similarity

### 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])

[Package coop version 0.6-2 Index]