# \#koopman

**URL:** https://discourse.julialang.org/tag/koopman/992.md

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## [Koopman inference fails for simple example while SINDy works fine](https://discourse.julialang.org/t/koopman-inference-fails-for-simple-example-while-sindy-works-fine/78706)

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**Author:** [@sdwfrost](https://discourse.julialang.org/u/sdwfrost)\
**Replies:** 1\
**Last updated:** [March 30, 2022, 11:00am UTC](https://discourse.julialang.org/t/koopman-inference-fails-for-simple-example-while-sindy-works-fine/78706 "2022-03-30T11:00:17Z")

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Hi All, I’m trying to put together a DataDrivenDiffEq.jl example for my demo system of an SIR epidemiological model. using OrdinaryDiffEq using DataDrivenDiffEq using ModelingToolkit function sir\_ode(u,p,t) (s,i,r…