We discussed M-files as early as in Practical 2.

Generally speaking, script M-file is a list of commands (programming code) saved in one document.

Some advantages:

• Easy to use: you can run all the commands in your file by hitting one key.
• No need to re-type or re-run lengthy code.

Disadvantages:

• Values from the script M-file can’t be easily assigned to variables in the Command Window. You must open, edit and save the M-file to edit values.