How to insert new empty lines in middle of an exisiting text file

Try using the functions importdata and strjoin with '\n' as the delimiter. importdata will give output a cell array that you can insert an extra row in. Something like:

rowNum=3;
textlines=[textlines(1:rowNum);sprintf('\n');textlines(rowNum+1:end)]

will insert a newline into the cell array at the desired row number. Strjoin can join the cell array together into a character array, which can be printed to a file using fopen and fprintf. Please see the documentation for these functions for more details.

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Answer 2

Guillaume 2017-8-25

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/354054-how-to-insert-new-empty-lines-in-middle-of-an-exisiting-text-file#answer_279233

编辑：Guillaume 2017-8-25

在 MATLAB Online 中打开

One of the many possible ways to do this:

filepath = 'c:\somewhere\somefile.txt;
contents = fileread(filepath);
lines = strsplit(contents, '\n', 'CollapseDelimiters', false);  
newlines = [lines(1:2), {'', ''}, lines(3:end)];  %to insert two blank lines at line 3
newcontents = strjoin(newlines, '\n');
fid = fopen(filepath, 'w');
fwrite(fid, newcontents);
fclose(fid);