# Efficient dataframe operations \[unclear task\]

**URL:** <https://discourse.julialang.org/t/efficient-dataframe-operations-unclear-task/111925>\
**Category:** Statistics\
**Tags:** matrix\
**Created:** [March 21, 2024, 10:02am UTC](https://discourse.julialang.org/t/efficient-dataframe-operations-unclear-task/111925 "2024-03-21T10:02:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![haidangel](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/haidangel/32/207898_2.png) [@haidangel](https://discourse.julialang.org/u/haidangel)\
**Post date:** [March 21, 2024, 10:02am UTC](https://discourse.julialang.org/t/efficient-dataframe-operations-unclear-task/111925/1 "2024-03-21T10:02:47Z")

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I have a dataframe with 2715 attribute columns, values ranging from [0, 0.92). Additionally, the dataframe has an auxiliary attribute column with one-hot values (0 or 1) for a binary classification task. I want to use Julia to deal with the mission of feature reduction for my task. This is [my effort](https://drive.google.com/drive/folders/1duMZ_ZjJx4NiScJhxdi4QQNnFpy1BO1l?usp=sharing). Yeah, I have tried Weight of Evidence, but the number is too low for both sensitivity and specifity with different models. I don’t know how to continue. I need your help. Thanks a real lot!

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**Author:** ![baggepinnen](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/baggepinnen/32/693_2.png) [@baggepinnen](https://discourse.julialang.org/u/baggepinnen)\
**Post date:** [March 21, 2024, 10:51am UTC](https://discourse.julialang.org/t/efficient-dataframe-operations-unclear-task/111925/2 "2024-03-21T10:51:05Z")

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> [@haidangel](#):
>
> I want to explore Julia mechanisms to achieve the best performance for the highest results.

What do you mean by this?

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**Author:** ![gdalle](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/gdalle/32/27854_2.png) [@gdalle](https://discourse.julialang.org/u/gdalle)\
**Post date:** [March 21, 2024, 12:47pm UTC](https://discourse.julialang.org/t/efficient-dataframe-operations-unclear-task/111925/3 "2024-03-21T12:47:19Z")

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> [@haidangel](#):
>
> This is [my effort](https://drive.google.com/drive/folders/1duMZ_ZjJx4NiScJhxdi4QQNnFpy1BO1l?usp=sharing),

This only contains a Python notebook and a CSV file