Methods and apparatus to improve feature engineering efficiency with metadata unit operations

An apparatus to apply feature engineering with metadata-driven unit operations, comprising:

• a log file retriever to retrieve a log file in a first file format, the log file containing feature occurrence data;
• a file to string operation builder to generate a first unit operation based on the first file format to extract the feature occurrence data from the log file to a string, the first unit operation associated with a first metadata tag;
• an extraction operation builder to generate second unit operations to identify respective features from the feature occurrence data, the second unit operations associated with respective second metadata tags;
• and
• an operation flow builder to generate a first vector output file of the feature occurrence data based on the first metadata tag and the second metadata tags.

A tangible computer readable storage medium comprising computer readable instructions which, when executed, cause a processor to at least:

• retrieve a log file in a first file format, the log file containing feature occurrence data;
• generate a first unit operation based on the first file format to extract the feature occurrence data from the log file to a string, the first unit operation associated with a first metadata tag;
• generate second unit operations to identify respective features from the feature occurrence data, the second unit operations associated with respective second metadata tags;
• and
• generate a first vector output file of the feature occurrence data based on the first metadata tag and the second metadata tags.