# ML Estimator

### Estimator:

An Estimator is an algorithm which can be fit on a DataFrame to produce a Transformer. E.g., a learning algorithm is an Estimator which trains on a DataFrame and produces a model.

![](https://2100080250-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M1PNTHVApkPePuMdTu3%2F-M2l4NvDmy2BfmmEg-4P%2F-M2lOjQDEWKQbYUN4J-e%2Fml_estimator.jpg?alt=media\&token=ea8f8fdd-32e2-4930-9c46-16211a3e8e65)

Keyword of an estimator is method ***fit***