MATLAB: Unable to call function in script

functionscript

I am using Win 10. I have included the folder where my scripts are via Set Path.

Here is an example:

In file InitializeNetwork.m, I have this function:

function nn = InitializeNetwork(architecture) % line #10

… …

end

================================

From matlab R017a command line, I did these:

>> architecture=[336 100 20];

>> nn = InitializeNetwork(architecture);

Error: File: InitializeNetwork.m Line: 10 Column: 15

Function with duplicate name "InitializeNetwork" cannot be defined.

======================================

Please advice. Thank you.

Best Answer

Answer to self:

The error was due to inserted test code at begin of file in the same script which calls that function. It appears one cannot call the function within the same script.

Error also occurs when you place code below the function you want to call.

Thank you everybody for helping.

Related Solutions

MATLAB: Is it possible to set a function within one m file and use that function in matlab

Yes. The function definition must be after the script calling it, and the name of the script cannot be the same as the name of the function.

MATLAB: How to save functions or sub functions in matlab

It is not clear from your explanation where you are defining the function, but I can see two main possibilities which would generate that error (or a similar error):

Trying to define a function in the command window: this is not allowed in MATLAB, all functions must be saved in a file (except for anonymous functions).
Trying to define a function inside a script: only MATLAB versions from R2016B+ support functions defined in scripts. You need to read the documentation carefully for your version, not the online help (which is for the most recent version): for your MATLAB version it is not possible to define a function inside a script.

In practice if you want to define a function then do NOT have any code outside of any function declaration, e.g. this needs to be the entire file contents:

function [m,s] = stat(x)
n = length(x);
m = sum(x)/n;
s = sqrt(sum((x-m).^2/n));
end

You can add local functions to the same file, but NO CODE outside of those functions. Save the function as a file stat.m (you should use the same name as the function itself). Then it will work.

Best Answer

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