| 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 .... For that reason, S4 methods cannot easily
be defined for binding together matrices inheriting from Matrix.
For that reason, cbind2 and rbind2 have
been provided for binding together two matrices, and we have
defined methods for these and the 'Matrix'-matrices.
As a substitute for S4-enabled versions of cbind and
rbind, you can use cBind and rBind with identical
syntax and semantic in order to bind together multiple matrices
("matrix" or "Matrix" and vectors.
cBind(..., deparse.level = 1) rBind(..., deparse.level = 1)
... |
matrix-like R objects to be bound together, see
|
deparse.level |
integer determining under which circumstances
column and row names are built from the actual arguments'
‘expression’, see |
The implementation of these is recursive, calling
cbind2 or
rbind2 respectively, where these have methods
defined and so should dispatch appropriately.
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
(a <- matrix(c(2:1,1:2), 2,2)) cbind(0, rBind(a, 7)) # remains traditional matrix D <- Diagonal(2) cBind(4, a, D, -1, D, 0) # a sparse Matrix