Can anyone please correct this code for me?

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Ismail Qeshta 2017-11-11

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https://ww2.mathworks.cn/matlabcentral/answers/366414-can-anyone-please-correct-this-code-for-me

评论： Ismail Qeshta 2017-11-11

采纳的回答： KSSV

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Hi,

I am trying to extract data from a sequence of files. I also need to extract the value of x that corresponds to peak y value from each plot. I have tried the following code but I can't get results. I would be grateful if someone can check it for me. I have attached herewith the files for your kind reference.

close all; clear all; clc;
folder = cd;
for k = 1:2;
    for j = 1:2;
        matFilenameA = sprintf('X%d.out', k);
        matData1     = load(fullfile(cd, matFilenameA));
        %
        matFilenameB = sprintf('Y%d.out', j);
        matData2     = load(fullfile(cd, matFilenameB));
        x = matFilenameA(:,2);
        y = matFilenameB(:,2);
        [maxvaly,idx] = max(y) ;
        maxvalx = x(idx);
        fid=fclose('all');
    end
end

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Birdman 2017-11-11

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You do not assign numerical arrays to x and y. I think you should write

    x= matData1(:,2);
    y= matData2(:,2);

Ismail Qeshta 2017-11-11

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Thanks. I have tried it, but the it still shows the following error message:

Index exceeds matrix dimensions.
Error in Try2 (line 14)
maxvalx = x(idx);

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采纳的回答

KSSV 2017-11-11

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https://ww2.mathworks.cn/matlabcentral/answers/366414-can-anyone-please-correct-this-code-for-me#answer_290527

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files = dir('*.txt') ;
N = length(files) ;
iwant = zeros(N,2) ;
for i = 1:N
    data = importdata(files(i).name) ;
    [val,idx] = max(data(:,2)) ;
    iwant(i,:) = [data(idx,1),val] ;
end

Copy all the text file sin one folder and runt his code.

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KSSV 2017-11-11

That's what the first code does.....you asked the same question yesterday....without reading your question I answered that.

Ismail Qeshta 2017-11-11

Thank you KSSV for your great help yesterday and today. Yes, I actually could get the the code yesterday work for only one set of data. But I still have confusion about how to get it worked in a loop.

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