# DataDrivenDiffEq.jl sparse regression

**URL:** <https://discourse.julialang.org/t/datadrivendiffeq-jl-sparse-regression/86312>\
**Category:** General Usage\
**Tags:** sciml, sindy\
**Created:** [August 25, 2022, 9:15am UTC](https://discourse.julialang.org/t/datadrivendiffeq-jl-sparse-regression/86312 "2022-08-25T09:15:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![yewalenikhil65](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yewalenikhil65/32/26873_2.png) [@yewalenikhil65](https://discourse.julialang.org/u/yewalenikhil65)\
**Post date:** [August 25, 2022, 9:15am UTC](https://discourse.julialang.org/t/datadrivendiffeq-jl-sparse-regression/86312/1 "2022-08-25T09:15:08Z")

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Regarding `DataDrivenDiffEq.jl` I have precalculated estimate of `candidate_matrix` and also `Derivative matrix`… How do i use sparse regression to solve for sparse coefficient matrix ?? `solve` on SINDy assumes basis in symbolic form… But i have basis as `candidate_matrix` stored in a csv file…

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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:** [August 25, 2022, 11:25am UTC](https://discourse.julialang.org/t/datadrivendiffeq-jl-sparse-regression/86312/2 "2022-08-25T11:25:42Z")

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I’m not sure there’s an easy way to dig into those internals. Open an issue instead.

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**Author:** ![yewalenikhil65](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yewalenikhil65/32/26873_2.png) [@yewalenikhil65](https://discourse.julialang.org/u/yewalenikhil65)\
**Post date:** [August 25, 2022, 11:43am UTC](https://discourse.julialang.org/t/datadrivendiffeq-jl-sparse-regression/86312/3 "2022-08-25T11:43:19Z")

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Opened an issue here

> <https://github.com/SciML/DataDrivenDiffEq.jl/issues/373>
>
> I have precalculated estimate of \`candidate\_matrix\` and also \`Derivative matrix\`…… How do i use sparse regression to solve for sparse coefficient matrix ?? \`solve\` on SINDy assumes basis in symbolic form… But i have basis as \`candidate\_matrix\` stored in a csv file…
> 
> Can we make little more flexible internals to achieve this ?