# How to best preallocate nested tuples of dataframes to store simulation results?

**URL:** <https://discourse.julialang.org/t/how-to-best-preallocate-nested-tuples-of-dataframes-to-store-simulation-results/107543>\
**Category:** New to Julia\
**Tags:** tuple, dataframes, data\_structures\
**Created:** [December 13, 2023, 2:09am UTC](https://discourse.julialang.org/t/how-to-best-preallocate-nested-tuples-of-dataframes-to-store-simulation-results/107543 "2023-12-13T02:09:12Z")\
**Posts on this page:** 1\
**Showing post:** 33

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**Author:** ![Tetrakai](https://avatars.discourse-cdn.com/v4/letter/t/4da419/32.png) [@Tetrakai](https://discourse.julialang.org/u/Tetrakai)\
**Post date:** [December 14, 2023, 10:56pm UTC](https://discourse.julialang.org/t/how-to-best-preallocate-nested-tuples-of-dataframes-to-store-simulation-results/107543/33 "2023-12-14T22:56:13Z")

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Thanks, but once again your response is due to a bad presentation of the question, apparently. What I am concerned with would all be contained within this:

```julia
MLflow.start_run()

```

> **[MLflow Julia Integration Guide](https://www.restack.io/docs/mlflow-knowledge-mlflow-julia-integration)**
>
> Explore how to integrate MLflow with Julia for efficient machine learning workflows and experiment tracking.

So unfortunately that doesn’t look like what I am looking for.

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_[View the full topic](https://discourse.julialang.org/t/how-to-best-preallocate-nested-tuples-of-dataframes-to-store-simulation-results/107543)._