How to import multiple text files from multiple folders and take maximum from each text file

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Nazanin Farsi 2022-5-29

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评论： Davide Masiello 2022-6-3

These are the main folders

And each folders contains these txt files, I need to import AllMaxDrift from each pga

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Nazanin Farsi 2022-5-30

2013

Stephen23 2022-5-30

@Nazanin Farsi: please upload a sample AllMaxDrift data file by clicking the paperclip button.

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回答（5 个）

Davide Masiello 2022-5-29

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在 MATLAB Online 中打开

clear,clc
n = 0.1:0.1:1.3;
for k = 1:length(n)
    filename = [num2str(n(k)),'pga/AllMaxDrift.out'];
    data     = readmatrix(filename);
    max_value(k) = max(data);
end

Something like this should work, although it strictly depends on the way the data inside the .out files are structured.

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Davide Masiello 2022-5-30

Could you please attach one of your AllMaxDrift.out files?

Walter Roberson 2022-5-30

readmatrix() did not exist in R2013.

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Nazanin Farsi 2022-5-30

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Nazanin Farsi 2022-5-30

AllMaxDrift.txt

here it is

Walter Roberson 2022-5-30

Yes, load() should be able to handle those files.

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Walter Roberson 2022-5-30

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在 MATLAB Online 中打开

I cannot be sure without a file to test with, but I suspect

n = 0.1:0.1:1.3;
for k = 1:length(n)
    filename = [num2str(n(k)),'pga/AllMaxDrift.out'];
    data     = load(filename, '-ascii');
    max_value(k) = max(data);
end

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Walter Roberson 2022-5-30

You do not need to open the files in MATLAB: that code will open the files for you.

You can paste that code into the command line if you want. Or you can store it into a .m file and execute the .m file (which is what I would recommend.)

Nazanin Farsi 2022-5-30

error.PNG

This error pops out! :((

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Davide Masiello 2022-5-30

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编辑：Davide Masiello 2022-5-31

在 MATLAB Online 中打开

Hey @Nazanin Farsi, based on your replies, maybe the following code will work.

n1 = 1:22;
n2 = 0.1:0.1:1.3;
max_value = zeros(length(n1),length(n2));
for row = 1:length(n1)
    for col = 1:length(n2)
        filename            = ['R',num2str(n1(row),'%i'),'/data/',num2str(n2(col),'%.1f'),'pga/AllMaxDrift.out'];
        data                = importdata(filename);
        max_value(row,col)  = data(3,15);
    end
end