Hy, for plotting CIE Diagrams i found Package pavo with function cieplot. That works fine. Now i want to have wavelength tick marks as well around the plotting area. Is there a way to do so, also other ways/Pakages to plot are welcome. My sample Code: library(pavo) coldat2 <- as.data.frame(matrix(rep(1/3, 3), nrow = 1, ncol = 3)) # Make sure this dataset works with the cieplot() function attr(coldat2, "clrsp") <- "CIEXYZ" colnames(coldat2) <- c("x", "y", "z") cieplot(coldat2, col="white", main="CIE Test Plot") Best regards Tilmann ______________________________________________ R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.