Duplicate rows

​

Definition

The duplicate rows test checks if there are rows that are identical to each other in the dataset.

​

Taxonomy

• Category: Integrity.
• Task types: LLM, tabular classification, tabular regression, text classification.
• Availability: development and monitoring.

​

Why it matters

• Duplicate rows on the training set can lead the model to overfit on the duplicated examples.
• Duplicate rows on the validation set can distort the aggregate metrics, making them overly optimistic or pessimistic.