Hi Debojit
I understand that you are encountering the error while replicating the scenario from MATLAB documentation. The error is occurring because the 'preprocessMiniBatch' function is not defined in your code. In the documentation, the function is defined in a later section as follows:
function [X,Y] = preprocessMiniBatch(XCell,YCell,classes)
% Concatenate.
X = cat(4,XCell{1:end});
% Extract label data from cell and concatenate.
Y = cat(2,YCell{1:end});
% One-hot encode labels.
Y = onehotencode(Y,1,ClassNames=classes);
end
Defining the 'preprocessMiniBatch' function as shown above will resolve the error.
I hope it helps!
