How to increase the accuracy of the classifiers?

haziqros_97

Hye everyone!

I really need your help. I am doing my thesis research using RM. My supervisor asked me to use Turbo Prep. The issue I faced now is the accuracy of the classifiers is below 70%. My supervisor wanted me to get above 80%, if possible. Can you guys give me some tips on how to increase the accuracy?

Thanks in advance.

lionelderkrikor

@haziqros_97,

You can find here a process with a performance strictly greater to 70 % using :
——杀upsampling
- feature engineering

Feel free to increase the time limit associated to the Automatic Feature Engineering operator (currently se to 180 seconds).

I think that to reach 80 % accuracy will be extremely difficult, maybe impossible...
Keep in mind that the accuracy is not the only criteria (the "Kaggle syndrom") to choose a model, you have to take into account :
- the simplicity of the model
- the interpretability of the model
- the capacity to "generalize" of the model...

Hope this helps,

Regards,

Lionel

lionelderkrikor

嗨@haziqros_97,

宽的年代ubject !!!

You can :

- preprocess /clean your data : impute missing value, replace rares values etc.
- perform feature engineering (feature selection/feature generation)
- try different models (NB, neural networks, Decision tree)
- optimize the parameters of the best model (usingOptimize Parametersoperator)

and ideally perform aCross Validationto evaluate the accuracy of your models. It is considered as a best practice, representative of the performance of your model(s) on future unseen data.

I hope it helps !

Regards,

Lionel

PS : Note that all the 4 steps described above can be automatically performed byAutoModelinside RapidMiner...

haziqros_97

Hi mate, thanks a lot for answering my question. I try it first. Later I'll get back to you.

haziqros_97

Sorry mate. I have tried as you said but the accuracy is still the same. Here I attach my original data before I cleaned it. Hopefully, someone can help me to do this and get the accuracy above 80%.
Please help me, guys.

Thanks in advance.

lionelderkrikor

@haziqros_97

What is the label in your dataset ?

Lionel

haziqros_97

SPM performance for English and Mathematics.

lionelderkrikor

@haziqros_97,

And an other process using the same preprocessing steps described above, but using the deep-learning library....

Hope this helps,

Regards,

Lionel

haziqros_97

Thanks lad for answering. Wishing you best of luck.