getml.preprocessors

Contains routines for preprocessing data frames.

Classes

EmailDomain()	EmailDomain extracts the domain from e-mail addresses.
Imputation([add_dummies])	Imputation replaces all NULL values in numerical columns with the mean of the remaining columns.
Mapping([aggregation, min_freq])	A mapping preprocessor maps categorical values, discrete values and individual words in a text field to numerical values.
Seasonal()	Seasonal extracts seasonal data from time stamps.
Substring(begin, length, unit)	Substring extracts substrings from categorical columns and unused string columns.
TextFieldSplitter()	A TextFieldSplitter splits columns with role getml.data.roles.text into relational bag-of-words representations to allow the feature learners to learn patterns based on the prescence of certain words within the text fields.