grid.yaxis.hh(at = NULL, label = TRUE, main = TRUE, gp = gpar(),
draw = TRUE, vp = NULL, labels)make.yaxis.hh.labels(at, main, labels = at)
grid.xaxis.hh(at = NULL, label = TRUE, main = TRUE, gp = gpar(),
draw = TRUE, vp = NULL, labels)
make.xaxis.hh.labels(at, main, labels = at)
link[grid]{grid.xaxis}
.link[grid]{grid.xaxis}