How to import specific columns from multiple text files into a single numeric array?

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Marcella Roth 2021-1-26

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https://ww2.mathworks.cn/matlabcentral/answers/727918-how-to-import-specific-columns-from-multiple-text-files-into-a-single-numeric-array

评论： Marcella Roth 2021-1-27

Hi,

I am extremely new to Matlab and have a question on how to import specific columns from multiple text files into a single numeric array. I have 5 text files all in a single directory. I would like to read in the second column of numbers from each of these 5 files into a single numeric array and export that array to a new text file with a new name. Is there a simple way to do this?

Thanks!

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Answer 1

David Hill 2021-1-26

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https://ww2.mathworks.cn/matlabcentral/answers/727918-how-to-import-specific-columns-from-multiple-text-files-into-a-single-numeric-array#answer_607013

在 MATLAB Online 中打开

newFile=[];
for k=1:5
    a=readmatrix(sprintf('yourFile%d.txt',k));%name files consistently with number at end
    newFile=[newFile;a(:,2)];
end
save('newFile.txt','newFile','-ascii');

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Marcella Roth 2021-1-27

Thank you so much for your help! This put the column 2 from each of the 5 files into a single column. Is there a way to put the column 2 from each of the 5 files into a separate column in the same file?

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