'datasetExists' not found (for GAN)

Hi,

I am a beginer in GAN and was trying this example below.

https://uk.mathworks.com/help/deeplearning/ug/train-generative-adversarial-network.html

As seen below, the first part of the code is for downloading the Flower data set. In there (in the code) it has something called "datasetExists".

% Download and extract the Flower data set
url = "http://download.tensorflow.org/example_images/flower_photos.tgz";
downloadFolder = tempdir;
filename = fullfile(downloadFolder,"flower_dataset.tgz");

imageFolder = fullfile(downloadFolder,"flower_photos");
if ~datasetExists(imageFolder)
    disp("Downloading Flowers data set (218 MB)...")
    websave(filename,url);
    untar(filename,downloadFolder)
end

But when I put these code in, I got "datasetExists" not found.

I got this in the command window.

Then I clicked the second link from the bottom, it opens up the datasetExists function. But it still doesn't help.

How to deal with this Error? I am not entirely sure. Can anyone share some opinions or advices please? Very much appreciated!!

Answer 1

[Sivylla Paraskevopoulou]

Hi! How are you opening the example? If you use this command:

openExample('nnet/TrainGenerativeAdversarialNetworkGANExample')

Then you open the example in a folder that includes all supporting files. One of these supporting files is datasetExists.m. If you are just copying and pasting parts of the example into your own script or at the command line, you will not have access to the supporting files, unless you add them to your current folder or path.

[Salad Box]

Thank you for your reply. If I click on "try this example", I can't really see the output line by line. I was just trying to understand what each line means by looking at the outputs.