How to save answers in an array using for loop

Question

Muhammad 2016-3-31

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https://ww2.mathworks.cn/matlabcentral/answers/276364-how-to-save-answers-in-an-array-using-for-loop

回答： Image Analyst 2016-3-31

Hi, I want to save all the answers of 100 iterations using for loop. The code for my task is given below. The problem is that only the value of the last iteration has saved and all I want to save all these values in an array. Please help me to solve this problem.

x=load('Inputnew.txt');
a=readfis('IFDCD');
for i=1:100
    for j=1:4
        y(j)=x(i,j);
    end
    predicted=evalfis(y,a);
    if(predicted<=0.2355)
        answer=11;
    elseif(predicted<=0.7841)
        answer=12;
    elseif(predicted<=1.385)
        answer=13;
    elseif(predicted<=1.945)
        answer=14;
    elseif(predicted<=2.295)
        answer=15;
    elseif(predicted<=2.795)
        answer=16;
    elseif(predicted<=3.135)
        answer=17;
    elseif(predicted<=3.465)
        answer=18;
    elseif(predicted<=4.065)
        answer=19;
    elseif(predicted<=4.405)
        answer=10;
    elseif(predicted<=5.015)
        answer=110;
    elseif(predicted<=5.725)
        answer=21;
    elseif(predicted<=6.352)
        answer=22;
    elseif(predicted<=6.681)
        answer=23;
    elseif(predicted<=7.291)
        answer=24;
    elseif(predicted<=7.628)
        answer=25;
    elseif(predicted<=8.238)
        answer=26;
    elseif(predicted<=8.567)
        answer=27;
    elseif(predicted<=9.241)
        answer=28;
    elseif(predicted<=9.573)
        answer=29;
    else
        answer=30;
    end
 end

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Answer 1

Star Strider 2016-3-31

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The way you have written your code, this line:

elseif(predicted<=9.573)

will always be true for all the other conditions, so the ‘answer’ will always be 29 or 30.

You need to set up your logic beginning with:

      if(predicted <= 0.2355)
          answer=11;
      elseif((predicted > 0.2355) & (predicted <= 0.7841))
          answer=12;
      . . .

and so for the others.

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Answer 2

Image Analyst 2016-3-31

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在 MATLAB Online 中打开

You need to index the answer array, otherwise you're just overwriting the same answer scalar at each iteration of i. So do this everywhere you have answer:

answer(i) = .........