How do I fix the "A METHODS block or END might be missing before the function definition. This might be causing additional error messages." issue.

Hey, I'm new to the app designer in MATLAB and while trying to write a code for a button push callback I get the message A METHODS block or END might be missing before the function definition. This might be causing additional error messages. Here's a screenshot for reference:

[Ahmed Mukhtar]

Additional error info:

Error using app4

Error: File: app4.mlapp Line: 57 Column: 9

Function definition not supported in this context. Create functions in code file.

Answer 1

[Image Analyst]

It looks like you defined the function ApplyNoiseButtonPushed inside itself. No - you cannot do that. A function cannot have another function nested inside it that has the same name as the parent function. Either delete that line, or (if it really is a separate function) call it something else.

Answer 2

[Jan]

The conditions are not recognized in the "elseif" commands. If you really want to move them to the next line, insert the line continuation "..." . But it looks nicer, if you move the condition to the same line as the elseif.

[Ahmed Mukhtar]

Thank you for the help with the elseif but I'm still getting the same error. Please see it below:

[Ahmed Mukhtar]

or the app if needed

[Jan]

There are two lines, which define the same function:

function ApplyNoiseButtonPushed(app, evt)     % First
   function ApplyNoiseButtonPushed(app, ~)    % Twice

Simply omit the 2nd one.