如何更改是否要切换大小写

Question

I have this code at the moment

s=[1 3 4 9 12 16 18 19 20 21];
for k=s   
    if k>2 & k<10
        a(k)=0;

    else if k>10 & k<20
          a(k)=1; 
        else a(k)=2;
        end
    end
end

I would like to rewrite this using a switch, case statement. How can I do this?

Answer 1

According to the documentation you can use cell arrays in case expression.

for k=s
    switch k
        case num2cell(3:9)
            a(k)=0;
        case num2cell(11:19)
            a(k)=1;
        otherwise
            a(k)=2;
    end
end

However you often do not want to use if/else or switch/case instead you can use indexing:

a(s) = 2;
a(s(s>2 & s<10)) = 0;
a(s(s>10 & s<20)) = 1;