Imagine if you could get all the tips and tricks you need to tackle a binary classification problem on Kaggle or anywhere else. I have gone over 10 Kaggle competitions including: $35,000 Toxic Comment Classification Challenge $25,000 TalkingData AdTracking Fraud Detection Challenge $20,000 IEEE-CI S Fraud Detection $50,000 Jigsaw Multilingual Toxic Comment Classification $25,000 RSNA Intracranial Hemorrhage Detection $30,000 SIIM-ACR Pneumothorax Segmentation $65,000 Jigsaw Unintended Bias in Toxicity Classification $65,000 Santander Customer Transaction Prediction $25,000 Microsoft Malware Prediction $25,000 Humpback Whale Identification – and pulled out that information for you. Dive in. Modeling Use two BiGru layers layers feeding into two final Dense Decide on the of 250 runs with Bayesian optimization best parameters by selecting the best out Use a 2-level by max-pooling and 2 fully-connected layers bidirectional GRU followed Dealing with imbalance problems Check this extensive notebook on handling imbalanced classes Class balancing of one-shots: Getting top-1 frequencies of classes and replacing “new whale” class with classes that are one-shots and not presented @ top-1 Metrics Global AUC explained (+alternatives) ROC AUC score for fraud detection Good Old Accuracy Mean Average Precision (MAP) Binary Log Loss F beta score, where beta is equal to 0.5 Loss BCE and Dice Based BCE with Logit Loss DICE loss for segmentation BCE + DICE Combinations of BCE, Dice and Focal loss Focal Loss Based Focal Loss Function BCE + focal loss Weighted Focal Loss Custom Losses Weighted subgroup negative samples Others Lovasz Loss Weighted sigmoid cross-entropy loss Hard triplet loss Center Loss Additive Angular Margin Loss Margin loss CosFace Loss KL-Div loss with soft label Cross-validation + proper evaluation Use Adversarial validation Apply GroupKFold cross-validation about last 100k records as a validation set Simple time-split and using Generate predictions using unshuffled KFold Use stratified test data 5 fold without early stopping for predicting Implement LightGBM on 10 KFolds with no shuffle If using pseudo labeling, to avoid overfitting don’t validate on the pseudo labels Use the for the final blend Standard 10 fold Stratified cross-validation with multiple seeds Post-processing Use of the history of submissions to tweak our test set predictions Select random 30% of CV, optimize the thresholds for the 30% and apply them to the remaining 70% and check how far off they are from the optimal thresholds of the 70% Use a re-scaling factor for predictions >0.8 as well as <0.01 through the use of probabilistic random noise that introduces a small penalty Scale up the predicted probability of comments that contain cursed words of different languages Label the test samples , adding them to the train set, and training to convergence using the best-performing ensemble Ensembling Averaging Averaging over multiple seeds Average 10 out-of-fold predictions Average multiple seeds Add model and bagging models with different folds diversity by seed averaging Geometric mean An ensemble of LightGBM, CatBoost weighted geometric mean Average different models of An average ensemble XLM-R models Average predictions for 7 language-specific models An ensemble of XLM-R models An ensemble of CatBoost, XGBoost, and LightGBM Stacking Stack Bi-LSTM, Bert-Large-Uncased with WWM, XLNET, with the meta model as ExtraTreesClassifier LightGBM Stacking Stack LightGBM with heavy bayesian optimization using and Stack models PyStackNet MlXtend An of RNN, CNN, LightGBM, and NBSV ensemble Use 5 time bagged XGB CV scores with heavy bayesian optimization Blending Use power blending Blend using and Hyperopt OOF to find optimal weights Others ensembling Implement Hillclimb Apply LGB g data samples bagged 10 times with different trainin Repositories and open solutions Repos with open source solutions Image based solutions Humpback Whale Identification 1st Place Code Data Science Bowl 2nd Place Solution Forecasting Lung Cancer Diagnoses with Deep Learning Kaggle data science bowl 2017 RSNA Intracranial Hemorrhage Detection 1st Place Solution 2nd Place Solution — RSNA Intracranial Hemorrhage Detection 3rd place solution RSNA Intracranial Hemorrhage Detection 4th Place Solution with code RSNA Intracranial Hemorrhage Detection 5th place solution for RSNA Intracranial Hemorrhage Detection RSNA Intracranial Hemorrhage Detection Entrypoint for the 5th-place-solution SIIM-ACR Pneumothorax Segmentation 1st Place Solution SIIM-ACR Pneumothorax Segmentation 3rd Place Solution 5th place solution SIIM-ACR Pneumothorax Segmentation Humpback Whale Identification 5th Place Solution Humpback Whale Identification 4th Place Solution Kaggle Humpback Whale Identification Challenge 2019 2nd place code Tabular based solutions How to implement and how it was used in the LibFM in Keras Talking Data competition on Kaggle XGB Fraud Detection Solution Fraud Detection Feature Engineering 2nd Place Solution Santander Customer Transaction Prediction Santander Customer Transaction Prediction 5th Place Solution S olution to the Kaggle Santander Customer Transaction Prediction competition 2nd place Solution the Microsoft Malware Prediction Challenge on Kaggle Text classification based solutions Toxic Comment Classification Challenge, 12th p lace solution for the Code and write-up Kaggle Toxic Comment Classification Challenge Jigsaw Unintended Bias in Toxicity Classification 4th Place Solution An open solution to the Toxic Comment Classification Challenge Challenge TalkingData AdTracking Fraud Detection 4th Place Solution Bronze medal Jigsaw Solution 2nd place solution for the 2017 national data science bowl Jigsaw Unintended Bias in Toxicity Classification 10th Place Solution Code for 3rd place solution in Kaggle Humpback Whale Identification Challenge Final thoughts Hopefully, this article gave you some background into binary classification tips and tricks, as well as, some tools and frameworks that you can use to start competing. We’ve covered tips on: architectures, losses, post-processing, ensembling, tools and frameworks. If you want to go deeper, simply follow the links and see how the best binary classification models are built. See also: Image Segmentation: Tips and Tricks from 39 Kaggle Competitions Text Classification: All Tips and Tricks from 5 Kaggle Competitions Tabular Data Binary Classification: All Tips and Tricks from 5 Kaggle Competitions This article was originally written by Derrick Mwiti and posted on the Neptune blog . You can find more in-depth articles for machine learning practitioners there.
