Changelog • echos

echos 1.0.4

CRAN release: 2026-06-15

Expanded package documentation, vignettes and README to better describe the ESN architecture, key hyperparameters, model selection procedure and tuning workflow.
Clarified the role of the formula argument in ESN() for the fabletools model interface.

Renamed m4_data to m4_monthly_subset to clarify that the dataset contains a monthly subset of the M4 competition data. The old name m4_data is retained for backward compatibility.
Improved documentation for m4_monthly_subset and synthetic_data.

CRAN release: 2026-02-21

Added reservoir scaling parameter tau to train_esn(), enabling dynamic control of reservoir size.
Added tune_esn() to tune hyperparameters alpha, rho and tau via time series cross-validation (i.e., rolling forecasts).
Added S3 methods summary.tune_esn() and plot.tune_esn() to summarize and visualize results from hyperparameter tuning.

Added input validation for y and inf_crit in train_esn() and levels in forecast_esn().
Improved documentation

CRAN release: 2025-06-23

Added forecast intervals to forecast_esn(), forecast.ESN() and plot.forecast_esn(). Forecast intervals are generated by simulating future sample path based on a moving block bootstrap of the residuals and estimating the quantiles from the simulations.
Added plot.esn() to visualize the internal states (i.e., the reservoir).
Added filter_esn() to extract ESN models from a mable.
Added synthetic_data, a dataset with synthetic time series data as tibble.

CRAN release: 2025-02-11