Systems and methods are described herein for a feature generator that may generate values for a plurality of features based on the feature names The plurality of features may comprise pre-calculated features and dynamic features. While values of the pre-calculated features may have been calculated beforehand, the names of the dynamic features may comprise instructions for calculating the values of the dynamic features. The feature generator may parse, based on a dynamic feature grammar, the names of the dynamic features to determine the instructions for calculating the values of the dynamic features. The instructions may comprise a function token, data tokens, and/or parameter tokens. The feature generator may calculate the dynamic values based on the tokens. The feature generator may be a part of a machine learning based data analyzing system and generate inputs for the data analyzing system.