invperm
invperm(v)
Return the inverse permutation of v.
Examples
Inverse Permutation using invperm()
The invperm(v)
function in Julia returns the inverse permutation of the input vector v
.
julia> v = [3, 1, 4, 2];
julia> invperm(v)
4-element Array{Int64,1}:
2
4
1
3
This example shows the inverse permutation of the input vector [3, 1, 4, 2]
.
Common mistake example:
julia> v = [1, 2, 3];
julia> invperm(v)
ERROR: ArgumentError: invalid permutation
In this example, an error occurs because the input vector [1, 2, 3]
is not a valid permutation. It must contain all unique integers from 1 to length(v)
. Ensure that the input vector is a valid permutation before using invperm()
.
See Also
User Contributed Notes
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