Create Test Array

The helper function test_array creates arrays of given dimension.

Usage

test_array(dim, random = FALSE, dimnames = FALSE)

Arguments

dim

Integer vector.

random

Boolean. Default set to FALSE. If TRUE, the elements are randomly generated (standard normal).

dimnames

(logical) decides whether dimnames should be created.

Value

Real valued array of dimension dim.

Details

The function test_array creates an array with either

• entries of the form x[i,j,...] = i*10^(n-1) + j*10^(n-2) + ..., where n is the number of dimensions,

• or randomly generated (standard normal) entries.

This function is mainly used to test operations on arrays (like btoeplitz, bhankel, bmatrix and dbind).

Examples

test_array(dim = 5)
#> [1] 1 2 3 4 5
test_array(dim = c(2,4), dimnames = TRUE)
#>      B
#> A     B=1 B=2 B=3 B=4
#>   A=1  11  12  13  14
#>   A=2  21  22  23  24
test_array(dim = c(2,4,3), dimnames = FALSE)
#> , , 1
#> 
#>      [,1] [,2] [,3] [,4]
#> [1,]  111  121  131  141
#> [2,]  211  221  231  241
#> 
#> , , 2
#> 
#>      [,1] [,2] [,3] [,4]
#> [1,]  112  122  132  142
#> [2,]  212  222  232  242
#> 
#> , , 3
#> 
#>      [,1] [,2] [,3] [,4]
#> [1,]  113  123  133  143
#> [2,]  213  223  233  243
#> 

if (FALSE) {
# the examples below throw an error
test_array(dim = c())
test_array(dim = c(2,-1,2))
}