A switch case with multiple results or switch expressions?

Question

Rishi Balasubramanian 2020-12-23

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/701132-a-switch-case-with-multiple-results-or-switch-expressions

评论： Walter Roberson 2020-12-23

Is such a switch case possible? If not, whats my workaround for it?

  switch r,d
    case d=1 && r=1
        continue
    case d=1 && r>1
        disp('zero')
    case d=0 && r=1
        disp('positive one')
    case d=0 && r>1
        disp('other value')
    end
    

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Answer 1

Cris LaPierre 2020-12-23

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在 MATLAB Online 中打开

First we need to fix some syntax issues.

A CONTINUE may only be used within a FOR or WHILE loop
Logical comparison requires 2 equals: d==1 && r>1

One way to swtich based on the value of multiple variables is this:

r = 1;
d = 0;
switch true
    case d==1 && r>1
        disp('zero')
    case d==0 && r==1
        disp('positive one')
    case d==0 && r>1
        disp('other value')
end
positive one

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Walter Roberson 2020-12-23

It is true that a continue can only be used within for or while, but we could speculate that this switch logic is indeed inside a loop.

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Answer 2

Walter Roberson 2020-12-23

1
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https://ww2.mathworks.cn/matlabcentral/answers/701132-a-switch-case-with-multiple-results-or-switch-expressions#answer_582942

在 MATLAB Online 中打开

  switch true
    case d==1 && r==1
        continue
    case d==1 && r>1
        disp('zero')
    case d==0 && r==1
        disp('positive one')
    case d==0 && r>1
        disp('other value')
    otherwise
          disp('Uh-oh!')
    end
    