How to plot performance graph after CNN training

I am new in deep learning and unable to plot performance graph after training my CNN architecture . My code is as follows :-

   opts = trainingOptions('sgdm',
    'Momentum', 0.9,
    'InitialLearnRate', 0.001, 
    'LearnRateSchedule', 'piecewise',
    'LearnRateDropFactor', 0.1,
    'LearnRateDropPeriod', 8,
    'L2Regularization', 0.004,
    'MaxEpochs', 40,
    'MiniBatchSize', 128,
    'Verbose', true);

   cifar10Net = trainNetwork(trainingImages, trainingLabels, layers, opts);

   YTest = classify(cifar10Net, testImages);

   accuracy = sum(YTest == testLabels)/numel(testLabels)