Empty function: gather.m

[svillaza]

What is the content of the function gather.m? I have been trying to run the example MNIST_Deep_Classifier but it produces the following message error:
**Undefined function or variable 'endfunction'.

Error in gather (line 3)
endfunction**

When I checked the function, this is empty, the only text, after the definition of the function,
is endfunction.

What is the purpouse of the function gather.m?

Thanks in advance.