I am not able to save my file on the trial version

when I try to save the file it says "unable to save file UNTITLED2. /UNTITLED2.m (Read-only file system)"

Note: UNTITLED2 is name of file

Answer 1

[Image Analyst]

1. "UNTITLED2. " is an unusal name for a folder. Not that a dot and a space are not allowed, but maybe just save it to a regular folder name, like "work" or something similar.
2. And use the FULL path name, like use a drive letter if you're on Windows.
3. And make sure the drive can be written to, like it's not readonly (like a CD) and you have permission to save to that folder.
4. Use fullfile to build a better filename.

[Walter Roberson]

Note that you will usually not be able to save files to the directory that MATLAB is installed in, so make sure that you have changed directory to one you have write access to.