select folder that also includes subfolders

I'd like to ask is it possible for uigetfile to select a folder so that the contents subfolders inside would get selected too

Here's my CNN code so far:

myfolder = 'D:\School Files\2021 - 2022 1st semester\ECE21131\fall dataset';

dataDir = fullfile(myfolder);

imdir = fullfile(dataDir);

imds = imageDatastore(imdir, "IncludeSubfolders",true ,"LabelSource","foldernames");

[imdsTrain,imdsValidation] = splitEachLabel(imds,0.8,'randomized');

imageSize = [240 320 3];

layers = [

imageInputLayer(imageSize)

convolution2dLayer(3,8,'Padding','same')

batchNormalizationLayer

reluLayer

maxPooling2dLayer(2,"Stride",2)

convolution2dLayer(3,16,'Padding','same')

batchNormalizationLayer

reluLayer

maxPooling2dLayer(2, 'Stride',2)

convolution2dLayer(3,32,'Padding','same')

batchNormalizationLayer

reluLayer

maxPooling2dLayer(2, 'Stride',2)

convolution2dLayer(3,64,'Padding','same')

batchNormalizationLayer

reluLayer

maxPooling2dLayer(2, 'Stride',2)

convolution2dLayer(3,128,'Padding','same')

batchNormalizationLayer

reluLayer

fullyConnectedLayer(6)

softmaxLayer

classificationLayer];

%trainetwork

valfrequency = floor(numel(imdsTrain.Files)/64);

options = trainingOptions('adam', ...

'MaxEpochs',32, ...

'InitialLearnRate',3e-4, ...

'Shuffle','every-epoch', ...

'MiniBatchSize',64,...

'ValidationData',imdsValidation, ...

'ValidationFrequency',valfrequency, ...

'Verbose',false, ...

'Plots','training-progress');

net = trainNetwork(imdsTrain,layers,options);

YPred = classify(net,imdsValidation);

Yvalidation = imdsValidation.Labels;

accuracy = mean(YPred == Yvalidation);

idx = [1 4 8 12 16 20 24 28 32 36 40 41 42];

figure

for i = 1:numel(idx)

subplot(5,5,i)

I = readimage(imdsValidation,idx(i));

label = YPred(idx(i));

imshow(I)

title(char(label))

end

whereas the first line would be replaced by a uigetfile

the "fall dataset" folder has 6 subfolders which would also be fed into the system for the CNN

so basically, I'd like a way something like uigetfile that takes in all .png files within a folder, and its subfolders

Answer 1

[dpb]

There is no builtin gui tool that does more than multi-select on files within a single folder; you have to traverse the directory tree programmatically. There are several submissions on FEX that do it and while I don't have a link to it, I know I've seen a very nice demonstration posted here as well by one of the several other MVPs -- I don't recall which just now.

I've complained for years that the MATLAB builtin dir() function doesn't accept switches such as /s -- it would be so handy for such cases if it did -- instead, most of the time I just build the appropriate dir command string including the wildcard filename expression and pass it to the OS and then iterate through the resulting returned array.