I need help on this Deep Network Quantizer code

I copied this code from https://www.mathworks.com/help/deeplearning/ref/deepnetworkquantizer-app.html

net = inceptionresnetv2();

quantobj = dlquantizer(net,'ExecutionEnvironment','GPU');

imds = imageDatastore('data', ...

'IncludeSubfolders',true, ...

'LabelSource','foldernames');

[calData, valData] = splitEachLabel(imds, 0.6, 'randomized');

aug_calData = augmentedImageDatastore([299 299], calData);

aug_valData = augmentedImageDatastore([299 299], valData);

quantObj = dlquantizer(net);

function accuracy = hComputeModelAccuracy(predictionScores, net, dataStore)

%% Computes model-level accuracy statistics

% Load ground truth

tmp = readall(dataStore);

groundTruth = tmp.response;

% Compare with predicted label with actual ground truth

predictionError = {};

for idx=1:numel(groundTruth)

[~, idy] = max(predictionScores(idx,:));

yActual = net.Layers(end).Classes(idy);

predictionError{end+1} = (yActual == groundTruth(idx)); %#ok

end

% Sum all prediction errors.

predictionError = [predictionError{:}];

accuracy = sum(predictionError)/numel(predictionError);

end

quantOpts = dlquantizationOptions('MetricFcn', ...

{@(x)hComputeModelAccuracy(x, net, aug_valData)});

calResults = calibrate(quantObj, aug_calData)

valResults = validate(quantObj, aug_valData, quantOpts)

valResults.MetricResults.Result

Error

Function definitions in a script must appear at the end of the file.

Move all statements after the "hComputeModelAccuracy" function definition to before the first local function

definition.