reset

Reset minibatchqueue to start of data

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Syntax

reset(mbq)

Description

reset(mbq) resets mbq back to the start of the underlying datastore.

Examples

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Reset `minibatchqueue` and Obtain More Mini-Batches

You can call next on a minibatchqueue until all data is returned. When you reach the end of the data, use reset to reset the minibatchqueue and continue obtaining mini-batches with next.

Create a minibatchqueue from a datastore.

ds = digitDatastore;
mbq = minibatchqueue(ds,'MinibatchSize',256)

mbq = 
minibatchqueue with 1 output and properties:

   Mini-batch creation:
           MiniBatchSize: 256
        PartialMiniBatch: 'return'
            MiniBatchFcn: 'collate'
    DispatchInBackground: 0

   Outputs:
              OutputCast: {'single'}
         OutputAsDlarray: 1
         MiniBatchFormat: {''}
       OutputEnvironment: {'auto'}

Iterate over all data in the minibatchqueue. Use hasdata to check if data is still available.

while hasdata(mbq)
    [~] = next(mbq);
end

When hasdata returns false, you cannot collect a mini-batch using next.

hasdata(mbq)

ans = 
   0

X = next(mbq);

Error using minibatchqueue/next (line 353)
Unable to provide a mini-batch because end of data reached. Use reset or shuffle to continue generating mini-batches from the data set.

Reset the minibatchqueue. Now, hasdata returns true, and you can continue to obtain data using next.