package-version {base} | R Documentation

## Package versions

### Description

A simple S3 class for representing package versions, and associated methods.

### Usage

    package_version(x, strict = TRUE)

    getRversion()

### Arguments

`x` | a character vector with package version strings.
`strict` | a logical indicating whether invalid package versions should results in an error (default) or not.

### Details

R (package) versions are sequences of at least two non-negative integers, usually (e.g., in package ‘`DESCRIPTION`’ files) represented as character strings with the elements of the sequence concatenated and separated by single `.` or `-` characters.

`package_version` creates a representation from such strings which allows for coercion and testing, combination, comparison, summaries (min/max), inclusion in data frames, subscripting, and printing.

`getRversion` returns the version of the running R as an object of class `"package_version"`.

### See Also

`compareVersion`

### Examples

    x <- package_version(c("1.2-4", "1.2-3", "2.1"))
    x < "1.4-2.3"
    c(min(x), max(x))
    x[2, 2]
    x$major
    x$minor

[Package base version 2.2.1 Index]