# cBind

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##### Versions of 'cbind' and 'rbind' recursively built on cbind2/rbind2

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.

Keywords
manip, array
##### Usage
cBind(..., deparse.level = 1)
rBind(..., deparse.level = 1)
##### Arguments
...
matrix-like Robjects to be bound together, see cbind and rbind.
deparse.level
integer determining under which circumstances column and row names are built from the actual arguments' expression, see cbind.
##### Details

The implementation of these is recursive, calling cbind2 or rbind2 respectively, where these have methods defined and so should dispatch appropriately.

##### Value

• 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()).

cbind2, cbind, Methods.

• cBind
• rBind
##### Examples
(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
Documentation reproduced from package Matrix, version 1.0-4, License: GPL (>= 2)

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