My score is always zero, please help. I am new to matlab. My code is below

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Zamokuhle Ngubane 2019-7-1

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https://ww2.mathworks.cn/matlabcentral/answers/469602-my-score-is-always-zero-please-help-i-am-new-to-matlab-my-code-is-below

评论： Shameer Parmar 2019-7-1

trainingDirectory   = fullfile(*);
testingDirectory = fullfile(*);
% |imageDatastore| recursively scans the directory tree containing the
% images. Folder names are automatically used as labels for each image.
trainingSet = imageDatastore(trainingDirectory,   'IncludeSubfolders', true, 'LabelSource', 'foldernames');
testingSet     = imageDatastore(testingDirectory, 'IncludeSubfolders', true, 'LabelSource', 'foldernames');
%% Extract HOG features from the train set.
numOfTrainImages = numel(trainingSet.Files);
cellSize=[8 8];
trainingFeatures = []; 
trainingLabels = [];
for i = 1:numOfTrainImages
   img = readimage(trainingSet, i);
   img = imbinarize(img);
   img = ~bwmorph(img,'thin',Inf);
   %[extractFeatures,visuals]= extractHOGFeatures(img);
   trainingFeatures(i,:)= extractHOGFeatures(img,'CellSize',cellSize);
  
end
% Get labels for each image.
trainingLabels = trainingSet.Labels;
classifier = fitcsvm(trainingFeatures, trainingLabels);
%% Extract HOG features from the test set.
setLabels = testingSet.Labels;
numOfTestImages = numel(testingSet.Files);
testingFeatures  = [];
for i = 1:numOfTestImages
   img = readimage(testingSet, i);
   img = imbinarize(img);
   img = ~bwmorph(img,'thin',Inf);
   %[extractFeatures,visuals]= extractHOGFeatures(img);
   testingFeatures(i,:)= extractHOGFeatures(img,'CellSize',cellSize);
end
[label,bothscores] = predict(classifier,trainingFeatures);
score = bothscores(:,1);
msgbox(sprintf('%.6f',score));