cbind2-methods | R Documentation |
The base functions cbind
and rbind
are
defined for an arbitrary number of arguments and hence have the first
formal argument ...
. Now, when S4 objects are found among the arguments,
base cbind()
and rbind()
internally “dispatch”
recursively, calling cbind2
or rbind2
respectively, where these have methods defined and so should dispatch
appropriately.
cbind2()
and rbind2()
are from the
methods package, i.e., standard R, and have been provided for
binding together two matrices, where in Matrix, we have
defined methods for these and the 'Matrix'
matrices.
## cbind(..., deparse.level = 1)
## rbind(..., deparse.level = 1)
## S4 method for signature 'Matrix,Matrix'
cbind2(x, y, ...)
## S4 method for signature 'Matrix,Matrix'
rbind2(x, y, ...)
... |
for |
deparse.level |
integer controlling the construction of labels
in the case of non-matrix-like arguments; see |
x , y |
vector- or matrix-like R objects to be bound together. |
typically a ‘matrix-like’ object of a similar
class
as the first argument in ...
.
Note that sometimes by default, the result is a
sparseMatrix
if one of the arguments is (even in
the case where this is not efficient). In other cases,
the result is chosen to be sparse when there are more zero entries is
than non-zero ones (as the default sparse
in
Matrix()
).
Martin Maechler
cbind
, cbind2
.
Our class definition help pages mentioning cbind2()
and
rbind2()
methods:
"denseMatrix"
,
"diagonalMatrix"
,
"indMatrix"
.
(a <- matrix(c(2:1,1:2), 2,2))
(M1 <- cbind(0, rbind(a, 7))) # a traditional matrix
D <- Diagonal(2)
(M2 <- cbind(4, a, D, -1, D, 0)) # a sparse Matrix
stopifnot(validObject(M2), inherits(M2, "sparseMatrix"),
dim(M2) == c(2,9))
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