Arguments block syntax not being recognised

Question

Will Hardiman 2020-1-31

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/502988-arguments-block-syntax-not-being-recognised

评论： sepand soltani 2021-12-23

I'm trying to use an arguments block for input argument validation in a standalone function. I followed the instructions here, and even tried copying the forwardSpeed example:

function forwardSpeed(a,b,c)
    arguments
        a double
        b char
        c SpeedEnum
    end
    % Function code
    disp(class(a)) % Line 9 (where the error is located)
    disp(class(b))
    disp(class(c))
end

however the editor does not highlight the syntax properly, and when I try to run it, I get the following error:

>>forwardSpeed(1,'a',2)
Error: File: /home/$USER/forwardSpeed.m Line: 9 Column: 5
This statement is not inside any function.
 (It follows the END that terminates the definition of the function "forwardSpeed".)
 

The output for my MATLAB version:

>>version
ans =
    '9.6.0.1214997 (R2019a) Update 6'

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Answer 1

Adam 2020-1-31

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/502988-arguments-block-syntax-not-being-recognised#answer_413062

编辑：Adam 2020-1-31

在 MATLAB Online 中打开

This was only introduced in 2019b (you can see at the bottom of the help page for 'arguments'). It is one of the disadvantages of using the online help (which is always for the latest version) rather than your offline help (which is for your version).

You can use

doc validateattributes

to achieve similar though, which is what I have been doing the past many years.