# Tullio - missing elements in vectors

**URL:** <https://discourse.julialang.org/t/tullio-missing-elements-in-vectors/104091>\
**Category:** General Usage\
**Tags:** tullio\
**Created:** [September 21, 2023, 4:44am UTC](https://discourse.julialang.org/t/tullio-missing-elements-in-vectors/104091 "2023-09-21T04:44:02Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Lincoln\_Hannah](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/lincoln_hannah/32/19198_2.png) [@Lincoln\_Hannah](https://discourse.julialang.org/u/Lincoln_Hannah)\
**Post date:** [September 21, 2023, 4:44am UTC](https://discourse.julialang.org/t/tullio-missing-elements-in-vectors/104091/1 "2023-09-21T04:44:03Z")

</div>

Is it possible to do

```julia
X::Vector{Any}=zeros(2)

@tullio X[i] = [1,missing][i]

```

in one line? something like

```julia
@tullio X[i]::Vector{Any} := [1,missing][i]

```

Also, is it possible to apply a custom aggregation function? something like

```julia
@tullio (x->join(x,' ')) s := [1,2][i]

```