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Write comma-separated value file




csvwrite(filename,M) writes matrix M into filename as comma-separated values. Specify filename as a character vector or string, for example, 'csvlist.dat' or "csvlist.dat".

csvwrite(filename,M,row,col) writes matrix M into filename starting at the specified row and column offset. The row and column arguments are zero based, so that row=0 and C=0 specify the first value in the file.


The following example creates a comma-separated value file from the matrix m.

m = [3 6 9 12 15; 5 10 15 20 25; ...
     7 14 21 28 35; 11 22 33 44 55];

type csvlist.dat


The next example writes the matrix to the file, starting at a column offset of 2.

type csvlist.dat



  • csvwrite terminates each line with a line feed character and no carriage return.

  • csvwrite writes a maximum of five significant digits. If you need greater precision, use dlmwrite with a precision argument.

  • csvwrite does not accept cell arrays for the input matrix M. To export a cell array that contains only numeric data, use cell2mat to convert the cell array to a numeric matrix before calling csvwrite. To export cell arrays with mixed alphabetic and numeric data, where each cell contains a single element, you can create an Excel® spreadsheet (if your system has Excel installed) using xlswrite. For all other cases, you must use low-level export functions to write your data. For more information, see Export Cell Array to Text File in the MATLAB® Data Import and Export documentation.

Introduced before R2006a

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