MATLAB: How to interpret this correlation graph in Neural Networks

annartificial neural networkDeep Learning Toolboxforecastingnarnarxneural networkstime series

I'm modeling a NARX with 1 target series and 5 additional variables (size of sample 162 and delay=12). I've used 90 hidden neurons and bayesian regularization for the training.
What does it mean this graph?
Thanks in advance for your help.

Best Answer

The magnitude of the correlations between the inputs and errors are large compared to the red line of significance. Therefore you should be able to significantly improve your design.
Hope this helps.
Thank you for formally accepting my answer
Greg