The ff_train function is designed to train an XGBoost model for deforestation prediction using the ForestForesight algorithm. It takes prepared data (usually from ff_prep), sets up the XGBoost parameters, trains the model, and optionally saves it. The function allows for customization of various XGBoost parameters and supports both training and validation data.

Exercises

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1. Basic Usage:
   Train a simple model using prepared data from ff_prep.

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