Write certain lines of a text file to another text file

Question

Homayoon 2015-6-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/223360-write-certain-lines-of-a-text-file-to-another-text-file

回答： Walter Roberson 2015-6-11

Hello All--

I have a problem that I could not solve it properly! I have a huge text file, and a single -column matrix. I have sorted this matrix in a ascending way. Each element of this matrix is corresponding to the line number of interest in the text file.

Basically I need to write a code such that the output file will include only the line of interest.

The following is the code I have written but it did not work at all! I do appreciate your helps.

Thanks

% I have tried to make a single-column excel file using the text file!!
filename1 = 'Text.xlsx';
Y = xlsread( filename1, 'A:A');
% This is the matrix containing the line numbers of interest 
filename2 = 'Matrix.xlsx';
Z = xlsread( filename2, 'A:A');
Q=zeros(N,0); %N is size of the matrix Z
for i=1:N
    Q(i,1) = Y((Z(i,1)),1);
end
xlswrite('newText.xlsx',Q ), % It did not work because my initial text file contains characters, numbers and words. it seems it cannot be transferred to a single-column matrix