R: Threshold a numeric array or vector

threshold {mmand}

R Documentation

Threshold a numeric array or vector

Description

This function thresholds an array or vector, setting elements below the threshold value to zero. The threshold can be given literally or calculated using k-means clustering.

Usage

threshold(x, level, method = c("literal", "kmeans"), binarise = TRUE)

Arguments

`x`	A numeric vector or array.
`level`	The literal threshold level, if required.
`method`	The method to use to calculate the threshold. If `"literal"` (the default) then the value of `level` will be used. If `"kmeans"` then the threshold value will be determined implicitly using k-means clustering.
`binarise`	Whether to set suprathreshold elements to unity (if `TRUE`), or leave them at their original values (if `FALSE`).

Author(s)

Jon Clayden <code@clayden.org>

Examples

x <- c(0.1, 0.05, 0.95, 0.85, 0.15, 0.9)
threshold(x, method="kmeans")
threshold(x, 0.5)