How to modify this "for" loop so it can read maximum Y value instead of X?

Question

Ismail Qeshta 2019-3-4

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/448143-how-to-modify-this-for-loop-so-it-can-read-maximum-y-value-instead-of-x

编辑： Ismail Qeshta 2019-3-4

Hi,

I have this code that reads maximum X value and its corresponding Y value, and prints all results (Y values) in one file.

I just need to modify this code, so it can read the maximum Y value.

For example, for the following set of data:

X Y

1 2

2 16

3 9

4 15

The code reads 4 (as the maximum X value) and prints 15 (as the corresponding Y value to the maximum X).

However, I need the modified code to just read and print 16 (as the maximum Y value).

The code:

S = dir('*.out');
C = natsortfiles({S.name});
N = numel(C);
g = 10;
Z = nan(g,1);
for k = 1:N/g
    for j = 1:g;
        data = load(C{10*(k-1)+j}); 
        [~,idx] = max(data(:,1));
        Z(j) = data(idx,2);
    end
    dlmwrite(['Result_',num2str(k),'.txt'],Z);
end

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Answer 1

Walter Roberson 2019-3-4

1
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https://ww2.mathworks.cn/matlabcentral/answers/448143-how-to-modify-this-for-loop-so-it-can-read-maximum-y-value-instead-of-x#answer_363788

编辑：Walter Roberson 2019-3-4

max(data(:,2)) instead of max(data(:,1)) . And on the next line assign from data(idx,1) instead of data(idx,2) if you want the corresponding X value, or leave it as-is if you want the y value.

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Walter Roberson 2019-3-4

在 MATLAB Online 中打开

S = dir('*.out');
C = natsortfiles({S.name});
N = numel(C);
g = 10;
for k = 1:N/g
    Z = nan(g,1);
    for j = 1:g;
        data = load(C{10*(k-1)+j}); 
        Z(j) = max(data(:,2));
    end
    dlmwrite(['Result_',num2str(k),'.txt'],Z);
end