Vectorsetops
Set operations on vectorlike objects
Perform set operations on Vector objects.
 Keywords
 methods
Usage
"union"(x, y)
"intersect"(x, y)
"setdiff"(x, y)
"setequal"(x, y)
Arguments
 x, y
 Vectorlike objects.
Details
The union
, intersect
, and setdiff
methods for
Vector objects return a Vector object containing respectively
the union, intersection, and (asymmetric!) difference of the 2 sets of
vector elements in x
and y
.
The setequal
method for Vector objects checks for set
equality between x
and y
.
They're defined as follow:
setMethod("union", c("Vector", "Vector"), function(x, y) unique(c(x, y)) ) setMethod("intersect", c("Vector", "Vector"), function(x, y) unique(x[x %in% y]) ) setMethod("setdiff", c("Vector", "Vector"), function(x, y) unique(x[!(x %in% y)]) ) setMethod("setequal", c("Vector", "Vector"), function(x, y) all(x %in% y) && all(y %in% x) )so they work outofthebox on Vector objects for which
c
,
unique
, and %in%
are defined.
Value
union
returns a Vector object obtained by appending to x
the elements in y
that are not already in x
.intersect
returns a Vector object obtained by keeping only
the elements in x
that are also in y
.setdiff
returns a Vector object obtained by dropping from
x
the elements that are in y
.setequal
returns TRUE
if x
and y
contain the
same sets of vector elements and FALSE
otherwise.union
, intersect
, and setdiff
propagate the names and
metadata columns of their first argument (x
).
See Also
 Vectorcomparison for comparing and ordering vectorlike
objects.
 Vector objects.

BiocGenerics::union
,BiocGenerics::intersect
, andBiocGenerics::setdiff
in the BiocGenerics package for general information about these generic functions.
Examples
## See ?`Hitssetops` for some examples.
Community examples
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