frev: Fast reverse
In data.table: Extension of `data.frame`
frev R Documentation
Fast reverse
Description
Similar to rev but faster.
Usage
frev(x)
Arguments
x
An atomic vector or list.
Details
Similar to rev, frev only retains three attributes: names, class, and factor levels.
Value
Returns the input reversed.
Examples
# on vectors
x = setNames(1:10, letters[1:10])
frev(x)
# list
frev(list(1, "a", TRUE))
data.table documentation built on Jan. 27, 2026, 5:07 p.m.
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| frev | R Documentation |
Fast reverse
Description
Similar to rev but faster.
Usage
frev(x)
Arguments
x |
An atomic |
Details
Similar to rev, frev only retains three attributes: names, class, and factor levels.
Value
Returns the input reversed.
Examples
# on vectors
x = setNames(1:10, letters[1:10])
frev(x)
# list
frev(list(1, "a", TRUE))
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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