1. A method for obtaining an estimator comprising: determining data; determining an initial estimator descriptive of a first distribution of the data; determining a target feature pertaining to the data; and selectively modifying the initial estimator based on the target feature to determine a modified estimator, the modified estimator providing a second distribution of the data, wherein selectively modifying includes iteratively updating the modified estimator by using a previously determined modified estimator to provide the initial estimator for a subsequent iteration.