Syntax:
title <title>
Where <title> is the new title of the plot and must be enclosed in quotes.
Examples:
This plots y=x with the title 'x':
plot x
This plots y=x with the title 'y=x':
plot x title 'y=x'
This plots x squared with title 'x^
2' and ``data.1'' with title 'measured data':
plot x**2 title "x^2", "data.1" t 'measured data'