It is my understanding that you want to know the possibility of overfitting in the above shown plot.
Overfitting happens when your model is not generalized i.e. error is very small for the training data and becomes very large for the test data. As per my observation from the above shown plot, the test error is comparable to the training error and finally both are converging to some small value. So, this is not overfitting.
Thanks,
Anurag Gupta
MathWorks India
