xtitle - add titles on a graphics window
xtitle add titles on a 2D or 3D plot. xtit is the general title, xax is the title on the x-axis and yax is the title on the y-axis. xtitle must be called after a call to a high level plotting function (plot2d, plot3d, ...). If the arguments are matrices, each line of the matrices is displayed on a different line.
Enter the command xtitle() to see a demo.