xcaxis(title='', xx=None, labels=None, y=None, lim=None, flip=False, ticklen=None, axshift=None, lbldist=None, ttldist=None, microshift=False)
xcaxis plots an x-axis with labels at specfied positions but ticks between the labels rather than at the label positions. First and last tick positions are extrapolated.
All arguments are optional.
title specifies title for axis.
xx specifies locations for the labels.
labels specifies the label texts.
y specifies intersect with y-axis. If None, defaults to a reasonable position below the data.
lim overrides the default positions of the first and last ticks.
flip, if True, inverts the sign of the settings from ticklen, textdist, and axshift.
xcaxis obeys settings from ticklen, textdist, and axshift.