Code

rng(1)
datafolder = "C:\Users\leere\Documents\MATLAB\Centrifugal Pump";

ads = audioDatastore(datafolder, ...
    'IncludeSubfolders',true, ...
    'FileExtensions','.wav', ...
    'LabelSource','foldernames');

% save Image to folder, and create the relevant subfolder
datafolder_scallogram = "datafolder/structure_Scallogram";
catego=categories(ads.Labels);
for i = 1:1:length(catego)
    imgLoc = fullfile(datafolder_scallogram,char(catego{i}));
    mkdir(imgLoc)
end

helperCreateRGBfromTF(ads,datafolder_scallogram)