# Improve code that estimates parameters using max likelihood, optim, differential equations and automatic differentiation?

**URL:** <https://discourse.julialang.org/t/improve-code-that-estimates-parameters-using-max-likelihood-optim-differential-equations-and-automatic-differentiation/84883>\
**Category:** New to Julia\
**Tags:** diffeq, optimization, autodiff\
**Created:** [July 27, 2022, 4:06pm UTC](https://discourse.julialang.org/t/improve-code-that-estimates-parameters-using-max-likelihood-optim-differential-equations-and-automatic-differentiation/84883 "2022-07-27T16:06:46Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![laurar1891](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/laurar1891/32/38443_2.png) [@laurar1891](https://discourse.julialang.org/u/laurar1891)\
**Post date:** [August 1, 2022, 7:10pm UTC](https://discourse.julialang.org/t/improve-code-that-estimates-parameters-using-max-likelihood-optim-differential-equations-and-automatic-differentiation/84883/8 "2022-08-01T19:10:26Z")

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I just created another question. I modified the code and it is more efficient in both languages, although I still have the same issue of faster convergence in R.

See:  
[Similar question](https://discourse.julialang.org/t/parameter-estimation-of-an-ode-in-julia-is-slower-than-in-r/85114)

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