drawIsopycnals(rhoLevels=6, rotateRhoLabels=TRUE, rho1000=FALSE,
eos=getOption("eos", default="unesco"),
cex=1, col="darkgray", lwd=par("lwd"), lty=par("lty"))TRUE to write all density labels horizontally.TRUE to write isopycnal labels as e.g. 1024 instead of 24."unesco" or
"teos". If the latter, then the computer must have the TEOS
library installed; see teos.plotTS, and may be called by the user
also, e.g. if an image plot is used to show TS data density.plotTS, which calls this.