Need help with my function

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Richard 2013-7-29

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评论： Joel Sande 2016-4-7

How can I input my own function? I type function [dist,vel,acc]= free_fall(t)or anything just involving the word function and receive an error message reading "FUNCTION keyword use is invalid here. This might cause later messages about END". I save the function as the script. Can not seem to figure it out.

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Answer 1

Jan 2013-7-29

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https://ww2.mathworks.cn/matlabcentral/answers/83414-need-help-with-my-function#answer_92985

编辑：Jan 2013-7-29

在 MATLAB Online 中打开

Function definitions are not allowed inside the Command Window or insider an M-script file, but only inside a function-M-file. You can recognize them by the first word "function".

The functions are defined either as sub-functions, after the main function has finished, or as nested function inside another function.

function Out = MainFunction(In)
disp('I''m the main function');
Nested;
SubFunction;
Nested;
    function Nested
      disp('I''m nested'');
    end
  end
function SubFunction
disp('I''m the sub function');
end

If you use nested function or any function is closed by end, all functions in an M-file must be closed by a trailing end.

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Joel Sande 2016-4-7

Thanks !

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Answer 2

David Sanchez 2013-7-29

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在 MATLAB Online 中打开

function [dist,vel,acc]= free_fall(t)
% The code of your function here
...
...
% no need of adding "end"

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Richard 2013-7-29

No, I didn't place the end on my code that is what the error message reads. When I run the code it also reads "Function definitions are not permitted in this context". in the command window. Thanks for trying though.

David Sanchez 2013-7-29

did you place your function in its own m-file, I mean, no any other code before the function declaration? Your error message is received when that is done. Functions has to be save in their own m-file.

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