@tight pumice The image shows three performance graphs generated by the nntraintool in MATLAB after training NARX neural network models. The top left graph is the performance plot of a NARX model trained using Levenberg-Marquardt algorithm. The top right graph is the performance plot of a NARX model trained using Bayesian Regularization algorithm. The bottom graph is the performance plot of a NARX model trained using Scaled Conjugate Gradient algorithm. Write a short summary by comparing the performances of each training algorithm and analyzing the best one.