code generation for custom layer 'PatchEmbedding' for target 'none' is not supported as it returns a dlarray object with data format'SCB' as output 'out'

Answer 1

[Akanksha]

Hi 素蓬,

This error occurs because code generation does not support custom layers that return dlarray objects with data format SCB (Sequence, Channel, Batch). The PatchEmbedding layer in Vision Transformers outputs dlarray with SCB, which is currently unsupported for target 'none'.

You can try out these following troubleshooting steps -

• Use predict in MATLAB onlyRun inference in MATLAB without generating code.
• Convert output to numeric arrayInside your custom layer, convert dlarray to single or double before returning:

out = extractdata(out);

This removes dlarray formatting but may break downstream layers.

• Avoid unsupported formatsIf code generation is required, design layers to output supported formats.

Kindly refer the following links for further information -

https://www.mathworks.com/help/deeplearning/ref/dlarray.html -

https://www.mathworks.com/help/deeplearning/ug/code-generation-for-custom-deep-learning-layers.html

Hope this helps!

Answer 2

[素蓬]

give a example of code generation of transformer in matlab R2025a