I am not able to use the function minibatchqueue. I get the error as "Unrecognized function or variable 'minibatchqueue'."

Part of the code:

mbqTrain = minibatchqueue(preprocessedTrainingData, 2,...

"MiniBatchSize", miniBatchSize,...

"MiniBatchFcn", @(images, boxes, labels) createBatchData(images, boxes, labels, classNames), ...

"MiniBatchFormat", ["SSCB", ""],...

"DispatchInBackground", dispatchInBackground,...

"OutputCast", ["", "double"]);

I am practicing YOLO V3 object detection using matlab. While I was trying out the code, I get this error

"Unrecognized function or variable 'minibatchqueue'."

I come to understand that minibatchqueue is an inbuilt function in matlab which is used to create mini-batches for deeplearning.

In that case why am I getting this error?

How do i fix it?

Thank You

[Iuliu Ardelean]

Hi -- I had the same problem but updating to R2020b fixed it for me.

[泽宇 王]

I'm also having the problem. Did you fix it?

Answer 1

[Steven Lord]

According to the documentation page this function was introduced in Deep Learning Toolbox in release R2020b. Do you have this toolbox installed (you can check this using the ver function) and are you using release R2020b or later (ver will also give you this information.)

Also according to that documentation page, the first input (ds) must be a datastore array. Is preprocessedTrainingData a datastore?

[SL: edited to correct release information. The documentation says it was released in R2020b not R2020a as I had originally stated.]

[Mohammad Chand Khan]

Thank You Steven for the answer. I checked. I am having the R2020a release and also the Deep Learning Toolbox is installed.

Also checked - the input 'preprocessedTrainingData is a datastore array.

Yet, I get that error.

For information, I am only trying to recreate this example:

Object Detection Using YOLO v3 Deep Learning

< https://in.mathworks.com/help/vision/ug/object-detection-using-yolo-v3-deep-learning.html >

Perhaps you can check the above example and tell me what I am missing out.

Thanks again for the help.

[Abdullah Othman]

I am having the same problem Mohammed. I am trying to apply an example of a GAN in here (https://www.mathworks.com/help/deeplearning/ug/train-generative-adversarial-network.html)

I have the Deep Learning toolbox in Release 2020a. I uninstalled the toolbox and installed again just in case, but the problem persists.

[Stephen Bradshaw]

I also have the issue and as above havethe Toolboxes installed and am using 2020a. Please advise...

[Catherine Cai]

I have the same issue when trying the example of GAN (https://www.mathworks.com/help/deeplearning/ug/train-generative-adversarial-network.html). My matlab is R2020a version with Deep Learning Toolbox.

[Steven Lord]

Going back, it appears I made a mistake. This function was introduced in release R2020b according to its documentation page not R2020a.