已回答 Write a file starting in column 7.
If your data is in csv format, you can use the command csvwrite with row and col parameters as follows:
row = 0;
col = 6; % ro...
已回答 How to add a column to an existing file?
I belelive you are trying to add a column of A to the file so your new file will be like this:
%--Existing file -- -- A --
4 ...