I get the error message: "Error in library(plotrix) : there is no package called ‘plotrix’ " Hurr -- View this message in context: http://r.789695.n4.nabble.com/Put-short-string-labels-vertically-near-tick-marks-on-bottom-axis-tp4690452p4690464.html Sent from the R help mailing list archive at Nabble.com.