Apply some code on this array

Question

Lanceric Tse 2018-8-13

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https://ww2.mathworks.cn/matlabcentral/answers/414708-apply-some-code-on-this-array

评论： Lanceric Tse 2018-8-13

Hi, I have an array

S=[ -2.8933   -2.3867  -11.5800  -17.3733    0   22.8400   32.9800   23.0533 6.4933    0.0000   27.2333   44.0333   30.2333    7.1333      0   40.2267   84.8867  138.0800  131.7400   -0.0000]

I need to apply these lines of code on every 5 values

    [Max,MaxIdx]=max(S)
    [Min,MinIdx]=min(S)
for n=1:5
  code(n)=0
    if n>=MinIdx & n<=MaxIdx || n<=MinIdx & n>=MaxIdx
      if MaxIdx > MinIdx
        code(n)=1
      else if MinIdx > MaxIdx
        code(n)=2
  
      end
    end
end
end

the result array code, should be 0 0 0 1 1 0 2 2 2 2 0 2 2 2 2 0 0 2 2 2

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Answer 1

Nicholas Galang 2018-8-13

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编辑：Nicholas Galang 2018-8-13

在 MATLAB Online 中打开

Looping through S and creating a temporary array every 5 values should do the trick.

for i=1:5:length(S)
    temp=S(i:i+4);
    [Max,MaxIdx]=max(temp);
    [Min,MinIdx]=min(temp);
      for n=1:5
      index=i+n-1;
    code(index)=0;
      if n>=MinIdx & n<=MaxIdx || n<=MinIdx & n>=MaxIdx
        if MaxIdx > MinIdx
          code(index)=1;
        else if MinIdx > MaxIdx
          code(index)=2;
    
        end
      end
          end
      end
  code
  end

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Nicholas Galang 2018-8-13

在 MATLAB Online 中打开

I'm not sure if I understand your complaint. This code snippet will only print out the final code array. If you want all the intermediate code arrays just remove the semicolon in this line,

code(index)=0;

this line

code(index)=1;

and this line.

code(index)=2;

Lanceric Tse 2018-8-13