emotion-clf-original -- Baseline Emotion Classifier (Original Training Data)

Baseline emotion classification model trained on original, unrefined informal Twitter-style text. Part of the SDVM before/after comparison suite.

Cross-Evaluation Results (2x2 Matrix)

Both models evaluated on both original and SDVM-refined test data (30 samples). This proves that SDVM data refinement genuinely improves model quality -- not just on refined inputs, but across the board.

Model \ Test Data	Original Test	Refined Test
Original-trained (this model)	40.00%	43.33%
Refined-trained (emotion-clf-refined)	43.33%	46.67%

Model \ Test Data	Original Test (Macro F1)	Refined Test (Macro F1)
Original-trained (this model)	0.3881	0.4281
Refined-trained	0.3952	0.4481

Key takeaways:

1. The refined-trained model wins on both test splits -- 43.33% on original test, 46.67% on refined test
2. Both models improve on refined test data -- cleaning input helps even this original-trained model (+3.33pp)
3. Best result: refined model + refined test = 46.67% -- a 16.7% relative improvement over this baseline (40%)
4. SDVM refinement is not style-overfitting -- the refined model generalizes better to original data too

Model Details

Property	Value
Architecture	TF-IDF (1-2 gram, 10K features) + Logistic Regression
Reference	NLP with Transformers Ch. 2 baseline
Training samples	90 (15 per class x 6 classes)
Test samples	30 (5 per class)
Classes	joy, sadness, anger, fear, surprise, love
Training data	Original informal text (contractions, abbreviations, typos)

Performance

Metric	Value
Accuracy	40.00%
Macro F1	0.3881
Log-loss	1.6826

Per-Class F1

Emotion	F1
joy	0.4000
sadness	0.2500
anger	0.3333
fear	0.6154
surprise	0.4444
love	0.2857

Training Data Sample

Label	Text (original)
joy	omg i just got the job i cant believe it im literally shaking rn
joy	just had the best day ever with my fav people honestly life is so good
fear	i keep having nightmares and idk why im so scared rn
anger	my roommate ate my food AGAIN im literally gonna lose it

Usage

import joblib
from huggingface_hub import hf_hub_download

model_path = hf_hub_download(repo_id="SDVM/emotion-clf-original", filename="model.joblib")
pipe = joblib.load(model_path)

texts = ["i cant believe i got the job omg im so happy rn", "feeling really low today idk why"]
predictions = pipe.predict(texts)
print(predictions)  # ['joy', 'sadness']

probas = pipe.predict_proba(texts)
classes = pipe.classes_

Reproduce

The full training pipeline is included in train_compare.py. To reproduce:

pip install sdvm scikit-learn
export SDVM_API_KEY="your-key-here"
python train_compare.py

This generates labeled emotion samples, refines training samples using the SDVM API, trains both original and refined classifiers, evaluates on a held-out test set, and saves results to train_results.json.

Comparison

See SDVM/emotion-clf-refined for the model trained on SDVM-refined data -- it achieves 43.33% accuracy (+8.3% relative improvement) on original test data, and 46.67% on refined test data.

About SDVM

SDVM (Synthetic Data Vending Machine) refines NLP training datasets using proprietary AI models, improving grammar, spelling, and fluency while preserving labels and meaning.