set xlabel '<text>'
The xlabel setting controls the label placed on its -axis (abscissa). For example:
set xlabel '$x$'
sets the label on the -axis to ‘
’. Labels can be placed on higher axes by inserting their number after the ‘x’, for example:
set x10label 'foo'
would label the tenth axis.
Similarly, labels can be placed on -axes as follows:
set ylabel '$y$' set y2label 'foo'