How to evaluate an already trained network?

Dear MATLAB experts!

I used this example (https://www.mathworks.com/help/vision/examples/object-detection-using-deep-learning.html) to train a new input set. However, I do not know how to plot the matrix of confusion or even know the accuracy of my network.

Is it possible to plot the matrix of confusion and know the accuracy from the training already done? And how can I do it?

[Fahad Parvez Mahdi]

Hi,

I also need the answer. Please update if you already got the way.

Thank you.