How to change output of function?

Question

Antonio Sarusic 2022-5-4

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1711690-how-to-change-output-of-function

评论： Monica Roberts 2022-5-6

Hello,

My problem is that when my if-statement is not fullfiled and the code executes the else-statement I just want it to return the text message. But i have to assign some value to W and if i do so and call the function it also shows me that A is empty. Is it possible to chang this that it just shows me the error message without the empty Value of A?

function W = hat(w)
 sz = size(w);
    if sz == [3 1]
        W = [0 -w(3) w(2); w(3) 0 -w(1); -w(2) w(1) 0];
    else
       disp('Variable w has to be a 3-component vector!');
       W=[];
    end
end
a = [1;2];
A = hat(a)

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Answer 1

Monica Roberts 2022-5-4

0
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https://ww2.mathworks.cn/matlabcentral/answers/1711690-how-to-change-output-of-function#answer_957105

在 MATLAB Online 中打开

You can use return to exit the function, but depending on how you use this function, it's usually helpful to have a default value for the output. You could also use MATLAB's built-in warning function:

function W = hat(w)
 sz = size(w);
    if sz == [3 1]
        W = [0 -w(3) w(2); w(3) 0 -w(1); -w(2) w(1) 0];
    else
       warning('Variable w has to be a 3-component vector!');
       return
    end
end