Metarank Docs
  • Introduction
    • What is Metarank?
    • Quickstart
    • Performance
  • Guides
    • Search
      • Reranking with cross-encoders
  • Reference
    • Installation
    • Event Format
      • Timestamp formats
    • API
    • Command-line options
    • Configuration
      • Feature extractors
        • Counters
        • Date and Time
        • Generic
        • Relevancy
        • Scalars
        • Text
        • User Profile
        • Diversification
      • Recommendations
        • Trending items
        • Similar items
        • Semantic similarity
      • Models
      • Data Sources
      • Persistence
    • Deployment
      • Standalone
      • Docker
      • Kubernetes
      • Prometheus metrics export
      • Custom logging
      • Warmup
    • Integrations
      • Snowplow
  • How-to
    • Automated ML model retraining
    • Automatic feature engineering
    • Running in production
  • Development
    • Changelog
    • Building from source
  • Doc versions
    • 0.7.9 (stable)
    • master (unstable)
Powered by GitBook
On this page
  • Word count
  • Relative number
  • List size

Was this helpful?

Edit on GitHub
  1. Reference
  2. Configuration
  3. Feature extractors

Generic

PreviousDate and TimeNextRelevancy

Last updated 1 year ago

Was this helpful?

Word count

Sometimes it can be useful to get the word length of a field, especially for models designed to personalize different types of content. You can use the word_count feature extractor to get the length of a string field with the following config:

- name: title_length
  type: word_count
  scope: item
  field: item.title // must be a string

Relative number

Update, v0.7.x: relative_number is deprecated and removed. Both XGBoost and LightGBM natively support this out of the box for all numeric features, so please use the feature.

List size

Counts the number of items in a string or numerical list. Example:

- name: toggled_filters_count
  type: list_size
  field: filters
  source: item
number