R中的矩阵警告

我在工作区中有两个元素rr和ll(两个矩阵)

我做

Warning message:
In cbind(ll, rr) :
  number of rows of result is not a multiple of vector length (arg 2)
dim(ll)
# [1] 3008   11
length(rr)
#[1] 3008

怎么可能？

为了说明Marta的评论:

set.seed(42)
ll <- matrix(rnorm(30),6, 5)
rr <- matrix(rnorm(6), 1, 6)
dim(ll)
# [1] 6 5
length(rr)
# [1] 6
cbind(ll, rr)
Error in cbind(ll, rr) : 
  number of rows of matrices must match (see arg 2)

cbind(ll, t(rr))
#            [,1]        [,2]       [,3]       [,4]       [,5]       [,6]
# [1,]  1.3709584  1.51152200 -1.3888607 -2.4404669  1.8951935  0.4554501
# [2,] -0.5646982 -0.09465904 -0.2787888  1.3201133 -0.4304691  0.7048373
# [3,]  0.3631284  2.01842371 -0.1333213 -0.3066386 -0.2572694  1.0351035
# [4,]  0.6328626 -0.06271410  0.6359504 -1.7813084 -1.7631631 -0.6089264
# [5,]  0.4042683  1.30486965 -0.2842529 -0.1719174  0.4600974  0.5049551
# [6,] -0.1061245  2.28664539 -2.6564554  1.2146747 -0.6399949  0.4554501

为了说明Heroka的评论:

dim(ll)
# [1] 6 5
dim(rr)
# [1] 1 6

If ll是矩阵和rr向量(R sense),即

rr <- as.numeric(rr)
dim(rr)
# NULL
length(rr)
# 6
cbind(ll, rr)
#                                                                      rr
# [1,]  1.3709584  1.51152200 -1.3888607 -2.4404669  1.8951935  0.4554501
# [2,] -0.5646982 -0.09465904 -0.2787888  1.3201133 -0.4304691  0.7048373
# [3,]  0.3631284  2.01842371 -0.1333213 -0.3066386 -0.2572694  1.0351035
# [4,]  0.6328626 -0.06271410  0.6359504 -1.7813084 -1.7631631 -0.6089264
# [5,]  0.4042683  1.30486965 -0.2842529 -0.1719174  0.4600974  0.5049551
# [6,] -0.1061245  2.28664539 -2.6564554  1.2146747 -0.6399949  0.4554501

要删除列名称:

cbind(ll, unname(rr))