reset

Reset minibatchqueue to start of data

Since R2020b

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

    Create a minibatchqueue object 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'
    PreprocessingEnvironment: 'serial'

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

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

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

    When hasdata returns 0 (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 object. Now, hasdata returns 1 (true), and you can continue to obtain data using next.

    reset(mbq);
hasdata(mbq)
    ans = 
   1

    X = next(mbq);

    Input Arguments

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    Mini-batch queue, specified as a minibatchqueue object.

    Version History

    Introduced in R2020b

    See Also

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    Topics