Validate a time-series forecast without leaking the future
Use chronological splits and fit preprocessing only on past data.
Python / Time series / Validation
Practical explanations of mathematical models: overfitting, quality evaluation, result checks and limits on conclusions.
Compare a model's conclusions with the task conditions and evaluation method. Explanations and checks help you recognize overfitting and understand where results become unreliable.
Use chronological splits and fit preprocessing only on past data.