Hello, I need to draw a vertical line on my plot, the uncertainty segment (which is a vertical segment on every point of my plot so I can have an idea about the probability that a point is misclassified.... clustering problem.....) I remember I have done it a long time ago in Splus using a function called "segment" to which we give the extrem point of the segment , I didn't find such function in R, does it exist in R and if yes what is the name please? Thank you so much Halima , The Netherlands -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._