Customizing Vectors R

This skill covers type-stable operations and custom vector class design using the vctrs package.

Core Benefits

• Type stability - Predictable output types regardless of input values
• Size stability - Predictable output sizes from input sizes
• Consistent coercion rules - Single set of rules applied everywhere
• Robust class design - Proper S3 vector infrastructure

When to Use vctrs

Use vctrs when:

1. Building custom vector classes - Data frame compatibility, subsetting
2. Type-stable functions in packages - Guaranteed output types
3. Consistent coercion/casting - Explicit rules, predictable behavior
4. Size/length stability - Predictable sizing from inputs