Congratulations to the winners

Alvin Smart Money Management Classification Challenge

Helping Kenya

$3 000 USD

Challenge completed ~3 years ago

Skills you will learn

Classification

497 joined

220 active

Info Data Chat Leaderboard

Start

Jun 22, 22

Jul 24, 22

Reveal

Jul 24, 22

msamwelmollel

University of Glasgow

Congratulations to the winners

Platform · 25 Jul 2022, 06:20 · 6

Just trust your private LB. When I saw the public LB score, I was so determined that I ignored my private LB. I wish I could rely on my CV. I'm excited to see what the top five did to get their scores. Congratulations to the winners.

Discussion 6 answers

harisonmg

Congratulations to the winners. I'd love to hear how those with top scores handled their cross-validation and avoided overfitting as well as feature engineering techniques used.

25 Jul 2022, 10:26

Upvotes 1

J0NNY

Adama science and technology university

Congratulations to all. Thanks to my teammate @Koleshjr. It was really an amazing competition we learned a lot from it and thanks to @zindi for hosting such a competition.

Our approach is

Deal with missing values
Drop unnecessary columns
Drop outliers (rows with the same data but different categories)
Count encoding & new features
MERCHANT CLUSTERING to 10 categories
Aggregation and feature combination
Automatic clustering using KMeans from CountVectrozer
Decomposition of features
Oversampling using SMOTE
StratifiedKFold with 5 split
Voting classification and model stacking

25 Jul 2022, 12:09 (edited 5 minutes later)

Upvotes 5

harisonmg

Did you decompose all features or it's only the outputs from CountVectorizer? If you don't mind, please share the method as well

replied to J0NNY25 Jul 2022, 12:49 (edited 2 minutes later)

Upvotes 0

J0NNY

Adama science and technology university

No we decomposed the aggregate features which were formed from the MERCHANT_NAME. The outputs of CountVectrizer clustered into groups using KMeans clustering.

replied to harisonmg25 Jul 2022, 14:36

Upvotes 1

Overfitted

Can you share your solution please 🙏?

replied to J0NNY25 Jul 2022, 14:44

Upvotes 0

J0NNY

Adama science and technology university

Sorry but Zindi is validating our solution, till then we can't share the notebook.

replied to Overfitted25 Jul 2022, 14:58

Upvotes 0

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