repeat
repeat(A, inner = Int[], outer = Int[])
Construct an array by repeating the entries of A
. The ith element of inner
specifies the number of times that the individual entries of the ith dimension of A
should be repeated. The ith element of outer
specifies the number of times that a slice along the ith dimension of A
should be repeated.
Examples

Repeat elements of an array:
julia> A = [1, 2, 3]; julia> repeat(A, inner = [2]) 6element Array{Int64,1}: 1 1 2 2 3 3
This example repeats each element of array
A
twice. 
Repeat rows of a matrix:
julia> A = [1 2; 3 4]; julia> repeat(A, outer = [2]) 4×2 Array{Int64,2}: 1 2 1 2 3 4 3 4
It repeats each row of matrix
A
twice.  Repeat elements of a multidimensional array:
julia> A = [1 2; 3 4]; julia> repeat(A, inner = [1, 2], outer = [2]) 4×4 Array{Int64,2}: 1 2 1 2 3 4 3 4 1 2 1 2 3 4 3 4
This example repeats each element of
A
along the second dimension twice and repeats the entire matrix twice along the first dimension.
Common mistake example:
julia> A = [1, 2, 3];
julia> repeat(A, inner = [2, 3])
ERROR: DimensionMismatch("repeat dimensions must be either 1 or equal to size(A)")
Here, the inner
parameter specifies a different number of repeats for each dimension, resulting in a DimensionMismatch
error. The inner
and outer
dimensions should either be of size 1 or match the corresponding dimensions of A
to avoid this error.
See Also
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