featForge is an R package for feature engineering tailored to credit scoring and application data analysis. It provides a suite of functions to extract, transform, and aggregate features from various data sources—including timestamps, email addresses, IP addresses, and transactional.
Cyclical Transformations:
Convert cyclic variables (like hours, days, and months) into sine and
cosine representations. These transformations help machine learning
models understand the inherent cyclical nature of time-based
features.
(See functions in utils.R)
Timestamp Feature Extraction:
Extract detailed date and time features from timestamps, including
month, day, week, and hour, along with their cyclical transformations.
Additional features include client age and the number of days until the
next birthday.
(See extract_timestamp_features.R)
Email Feature Extraction:
Parse and analyze email addresses to extract domains, username
characteristics, and string distance metrics, which are useful for
credit scoring and fraud detection.
(See extract_email_features.R)
IP Address Feature Extraction:
Process both IPv4 and IPv6 addresses to derive a rich set of features,
such as octet-level breakdowns, numeric conversions, entropy measures,
and spatial encoding via Hilbert curves.
(See extract_ip_features.R)
Data Aggregation:
Aggregate numeric data over specified time periods (daily, weekly,
monthly, or custom cycles) and compute summary statistics, enabling you
to capture trends and patterns over time.
(See aggregate_applications.R)
Sample Data:
Use included sample datasets like featForge_sample_data and
featForge_transactions to quickly test and demonstrate the
package functionality.
Install the development version of featForge directly from GitHub with:
```r devtools::install_github(“LordRudolf/featForge”)