Numeric Precision

PETsARD automatically tracks and maintains the precision (decimal places) of numeric fields, applying rounding in Loader, Preprocessor, and Postprocessor stages to ensure synthetic data matches the original data’s precision. Precision is only applied at output and doesn’t affect model training.

Usage

Automatic Inference (Default)

Without providing a schema, or without specifying precision in the schema, the system automatically infers precision:

fields:
  price:
    name: price
    type: float
    # Don't set precision, system will auto-infer
    # e.g., data: 10.12, 20.68 → auto-inferred as precision: 2

Manual Specification

When you need explicit control over precision, set precision in the schema. Each field can have independent precision settings:

fields:
  balance:
    name: balance
    type: float
    type_attr:
      precision: 2  # Force 2 decimal places

Inference Rules

Special Cases:

• With null values: Only infer from non-null values
• Mixed precision: Use maximum decimal places