Concatenating matrices

tda_mcath concatenates horizontally – TDA's mcath, matching cbind. tda_mcatv concatenates vertically – TDA's mcatv, matching rbind. tda_mcathv takes the matrix direct sum: the inputs placed as block-diagonal blocks, zero elsewhere – TDA's mcathv (all three take two or more matrices).

Usage

tda_mcath(..., dir = tempfile("tda"))

tda_mcatv(..., dir = tempfile("tda"))

tda_mcathv(..., dir = tempfile("tda"))

Arguments

...

two or more numeric matrices.

dir

working directory.

Value

A numeric matrix.

See also

Other matrix reshaping: tda_mag(), tda_mcvec(), tda_mrsum(), tda_msort(), tda_msrow(), tda_mtrim()

Examples

A <- matrix(1:4, 2); B <- matrix(5:8, 2)
tda_mcath(A, B)    # == cbind(A, B)
#>      [,1] [,2] [,3] [,4]
#> [1,]    1    3    5    7
#> [2,]    2    4    6    8
tda_mcatv(A, B)    # == rbind(A, B)
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
#> [3,]    5    7
#> [4,]    6    8
tda_mcathv(A, B)   # block-diagonal direct sum
#>      [,1] [,2] [,3] [,4]
#> [1,]    1    3    0    0
#> [2,]    2    4    0    0
#> [3,]    0    0    5    7
#> [4,]    0    0    6    8