Thanks Jim, maybe now I can start learning. Here is a run of my trying to learn: > xvalue<-c(5.2,1.3,9.7,2.8,8.1,4.7,6.6,7.4) > yvalue<-c(9,3,4,7,2,5,3,6) > plot(xvalue,yvalue) > axis(1,at=NULL,labels=1/xvalue,digits=5) Error in axis(1, at = NULL, labels = 1/xvalue, digits = 5) : 'labels' is supplied and not 'at' In addition: Warning message: In axis(1, at = NULL, labels = 1/xvalue, digits = 5) : "digits" is not a graphical parameter > Why can't R automatically compute the spacing when I use the formula? How can I specify n-digits or width instead of round or nothing?
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