# VectorOfArrays: iterating over pairs; type qualifier when containing specific SVector

**URL:** <https://discourse.julialang.org/t/vectorofarrays-iterating-over-pairs-type-qualifier-when-containing-specific-svector/82939>\
**Category:** New to Julia\
**Tags:** ode, iterators, staticarrays, differentialequation\
**Created:** [June 17, 2022, 8:30pm UTC](https://discourse.julialang.org/t/vectorofarrays-iterating-over-pairs-type-qualifier-when-containing-specific-svector/82939 "2022-06-17T20:30:23Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![mbudisic](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mbudisic/32/31044_2.png) [@mbudisic](https://discourse.julialang.org/u/mbudisic)\
**Post date:** [June 17, 2022, 8:46pm UTC](https://discourse.julialang.org/t/vectorofarrays-iterating-over-pairs-type-qualifier-when-containing-specific-svector/82939/3 "2022-06-17T20:46:53Z")

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Thanks for the suggestion - that’s what I originally had in my code, but I’ve been having a hard time getting a plain vector of static vectors to play nice with adaptive ODE integrators. Guided by discussion [ODE of Vector of Matrices](https://discourse.julialang.org/t/ode-of-vector-of-matrices/68889) I decided to try out `VectorOfArray`.

If I were doing this in MATLAB, I would simply store them as a matrix (each column one particle), but I’m trying to “stretch” myself and try out other ways that (at least to me) appear more julian.

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