Specify the string used to label the x-axis of the current axis.
An optional list of property/value pairs can be used to change the properties of the created text label.
If the first argument hax is an axes handle, then operate on
this axis rather than the current axes returned by gca
.
The optional return value h is a graphics handle to the created text object.
See also: ylabel, zlabel, datetick, title, text.
Package: octave