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Unique name for temporary file


tmpName = tempname



tmpName = tempname returns a character vector, tmpName, suitable for use as a temporary file path in your system’s temporary folder.


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Create a temporary file name that has the extension, .dat, by concatenating two character vectors.

tmpName = [tempname,'.dat'];

Create a temporary file name.

filename = tempname;

Create a new file with the temporary file name, and write data to the file.

fileID = fopen(filename,'w');


  • In most cases, tempname generates a universally unique identifier (UUID). However, if you run MATLAB® without JVM™ software, then tempname generates a random character vector using the CPU counter and time, which is not guaranteed to be unique. For more information about the MATLAB startup option that does not load JVM software, see Commonly Used Startup Options.

Introduced before R2006a

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