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Make a list of items in x, regardless of x's type

make_list.Rd

Repeats x as necessary to make n of them. Does not try to simplify x.

Usage

make_list(x, n, lenx = ifelse(is.vector(x), length(x), 1))

Arguments

x

The object to be duplicated.

n

The number of times to be duplicated.

lenx

The length of item x. Be default, lenx is taken to be length(x),

Value

A list of x duplicated n times

Details

If x is itself a vector or list, you may want to override the default value for lenx. For example, if x is a list that should be duplicated several times, set lenx = 1.

Examples

m <- matrix(c(1:6), nrow=3, dimnames = list(c("r1", "r2", "r3"), c("c2", "c1")))
make_list(m, n = 1)
#> [[1]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
make_list(m, n = 2)
#> [[1]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
#> [[2]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
make_list(m, n = 5)
#> [[1]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
#> [[2]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
#> [[3]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
#> [[4]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
#> [[5]]
#>    c2 c1
#> r1  1  4
#> r2  2  5
#> r3  3  6
#> 
make_list(list(c(1,2), c(1,2)), n = 4)
#> [[1]]
#> [1] 1 2
#> 
#> [[2]]
#> [1] 1 2
#> 
#> [[3]]
#> [1] 1 2
#> 
#> [[4]]
#> [1] 1 2
#> 
m <- matrix(1:4, nrow = 2)
l <- list(m, m+100)
make_list(l, n = 4)
#> [[1]]
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
#> 
#> [[2]]
#>      [,1] [,2]
#> [1,]  101  103
#> [2,]  102  104
#> 
#> [[3]]
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
#> 
#> [[4]]
#>      [,1] [,2]
#> [1,]  101  103
#> [2,]  102  104
#> 
make_list(l, n = 1) # Warning because l is trimmed.
#> Warning: n not evenly divisible by length(x)
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
make_list(l, n = 5) # Warning because length(l) (i.e., 2) not evenly divisible by 5
#> Warning: n not evenly divisible by length(x)
#> [[1]]
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
#> 
#> [[2]]
#>      [,1] [,2]
#> [1,]  101  103
#> [2,]  102  104
#> 
#> [[3]]
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
#> 
#> [[4]]
#>      [,1] [,2]
#> [1,]  101  103
#> [2,]  102  104
#> 
#> [[5]]
#>      [,1] [,2]
#> [1,]    1    3
#> [2,]    2    4
#> 
make_list(list(c("r10", "r11"), c("c10", "c11")), n = 2) # Confused by x being a list
#> [[1]]
#> [1] "r10" "r11"
#> 
#> [[2]]
#> [1] "c10" "c11"
#> 
make_list(list(c("r10", "r11"), c("c10", "c11")), n = 2, lenx = 1) # Fix by setting lenx = 1
#> [[1]]
#> [[1]][[1]]
#> [1] "r10" "r11"
#> 
#> [[1]][[2]]
#> [1] "c10" "c11"
#> 
#> 
#> [[2]]
#> [[2]][[1]]
#> [1] "r10" "r11"
#> 
#> [[2]][[2]]
#> [1] "c10" "c11"
#> 
#>