cBind {Matrix} | 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)
## and e.g.,
## S4 method for signature 'denseMatrix,sparseMatrix'
cbind2(x,y, sparse = NA, ...)
## S4 method for signature 'sparseMatrix,denseMatrix'
cbind2(x,y, sparse = NA, ...)
## S4 method for signature 'denseMatrix,sparseMatrix'
rbind2(x,y, sparse = NA, ...)
## S4 method for signature 'sparseMatrix,denseMatrix'
rbind2(x,y, sparse = NA, ...)
..., x, y |
matrix-like R objects to be bound together, see
|
sparse |
option |
deparse.level |
integer determining under which circumstances
column and row names are built from the actual arguments'
‘expression’, see |
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()
).
Before R version 3.2.0 (April 2015), we have needed a substitute for
S4-enabled versions of cbind
and rbind
, and
provided cBind
and rBind
with identical syntax and
semantic in order to bind together multiple matrices ("matrix"
or "Matrix"
and vectors.
With R version 3.2.0 and newer, cBind
and rBind
are
deprecated and produce a deprecation warning (via
.Deprecated
), and your code should start using
cbind()
and rbind()
instead.
Martin Maechler
cbind2
, cbind
,
Documentation in base R's methods package.
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))