https://uk.mathworks.com/matlabcentral/answers/1655570-unrecognized-function-or-variable-gr_outputpredicted-error-in-testcnn-line-75-predictionerror
Unrecognized function or variable 'GR_outputpredicted'. Error in testcnn (line 75) predictionError...
Unrecognized function or variable... Learn more about deep learning, cnn Deep Learning Toolbox, MATLAB