compareVersion

From utils v3.6.1 by R-core R-core@R-project.org

Compare Two Package Version Numbers

Compare two package version numbers to see which is later.

Keywords: utilities

Usage

compareVersion(a, b)

Arguments

a, b: Character strings representing package version numbers.

Details

R package version numbers are of the form x.y-z for integers x, y and z, with components after x optionally missing (in which case the version number is older than those with the components present).

Value

0 if the numbers are equal, -1 if b is later and 1 if a is later (analogous to the C function strcmp).

Examples

library(utils)

# NOT RUN {
compareVersion("1.0", "1.0-1")
compareVersion("7.2-0","7.1-12")
# }

Documentation reproduced from package utils, version 3.6.1, License: Part of R 3.6.1

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