%%file magic broken

[benkay86]

There seems to be an issue with writing functions in Jupyter notebooks. I have the following cell:

%%file hello.m

function hello()
    disp("Hello world!");
end

And I get:

Function definition are not supported in this context. Functions can only be created as local or nested functions in code files.

Error in jupyter.execute (line 51)
resp = jsondecode(matlab.internal.editor.evaluateSynchronousRequest(request));

Error in processJupyterKernelRequest (line 54)
            output = jupyter.execute(code, kernelId);

Error in connector.internal.fevalMatlab

Error in connector.internal.fevalJSON

Running jupyterlab 4.0.6, Matlab R2021a (9.10.0.1602886), and jupyter-matlab-proxy 0.7.2.

[rashedmyt]

Hi @benkay86

Thank you for trying out MATLAB Integration for Jupyter.

Currently, MATLAB Kernel does not support magics which are provided by IPython
and Metakernel. Hence, the line %%file hello.m will be treated as a comment in
MATLAB language.

Also, support for functions within a cell is only valid if it is also being used
in the same cell. For example

hello()

function hello()
    disp("Hello world!");
end

Currently, MATLAB Kernel does not support cross-cell function definition and usage.
If you are interested in this feature, please subscribe to #65
to get notified with related updates.

Hope this answers your query.

[benkay86]

Ah, my mistake. The documentation I was following was actually for an older, not-official Jupyter-Matlab integration.