# Missing line from deffeqflux blog post

**URL:** <https://discourse.julialang.org/t/missing-line-from-deffeqflux-blog-post/75141>\
**Category:** Machine Learning\
**Tags:** question, diffeqflux\
**Created:** [January 24, 2022, 6:08pm UTC](https://discourse.julialang.org/t/missing-line-from-deffeqflux-blog-post/75141 "2022-01-24T18:08:32Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pl-ai](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pl-ai/32/33137_2.png) [@pl-ai](https://discourse.julialang.org/u/pl-ai)\
**Post date:** [January 24, 2022, 6:08pm UTC](https://discourse.julialang.org/t/missing-line-from-deffeqflux-blog-post/75141/1 "2022-01-24T18:08:32Z")

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In the blog post linked from the diffeqflux package ([DiffEqFlux.jl – A Julia Library for Neural Differential Equations](https://julialang.org/blog/2019/01/fluxdiffeq/)), there is this section down the page:

Notice that we are not learning a solution to the ODE. Instead, what we are learning is the tiny ODE system from which the ODE solution is generated. I.e., the neural network inside the neural\_ode layer learns this function:

Thus **it learned a compact representation of how the time series works** , and it can easily extrapolate to what would happen with different starting conditions. Not only that, it’s a very flexible method for learning such representations. For example, if your data is unevenly spaced at time points `t` , just pass in `saveat=t` and the ODE solver takes care of it.

Clearly there is something missing after “this function:” which is making this impossible to understand. Can anyone illuminate?

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**Author:** ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)\
**Post date:** [January 25, 2022, 8:10am UTC](https://discourse.julialang.org/t/missing-line-from-deffeqflux-blog-post/75141/2 "2022-01-25T08:10:13Z")

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[https://github.com/JuliaLang/www.julialang.org/pull/1514](https://github.com/JuliaLang/www.julialang.org/pull/1514)