| compareVersion {utils} | R Documentation |
Compare two package version numbers to see which is later.
compareVersion(a, b)
a, b |
Character strings representing package version numbers. |
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).
0 if the numbers are equal, -1 if b is later
and 1 if a is later (analogous to the C function
strcmp).
package_version,
library, packageStatus.
compareVersion("1.0", "1.0-1")
compareVersion("7.2-0","7.1-12")