pymovements.gaze.GazeDataFrame.pos2vel# GazeDataFrame.pos2vel(method: str = 'smooth', **kwargs) → None[source]# Compute gaze velocites in dva/s from dva position coordinates. This method requires a properly initialized experiment attribute. After success, the gaze dataframe is extended by the resulting velocity columns. Parameters: method (str) – Computation method. See pos2vel() for details, default: smooth. **kwargs – Additional keyword arguments to be passed to the pos2vel() method. Raises: AttributeError – If gaze is None or there are no gaze dataframes present in the gaze attribute, or if experiment is None.