Sorry, I have read other posts on tick marks but nothing is working. Here is my R code. I was able to turn off the x axis at one point (I removed that code), but never got the tick marks on by 20s. It always goes to the default of 50, 100, 150, 200.
Thanks. R code: hist(OMY$FL, main = "2010 Oncorhynchus mykiss Fork Length Frequencies at Buck Creek Reach 1", include.lowest = TRUE, col = "blue", border = "white", breaks = 140, xlab = "Fork Length in mm", ylab = "Frequency", xlim = range(0,200), ylim = range (0,15), xbar=10) -- View this message in context: http://r.789695.n4.nabble.com/need-tick-marks-by-10s-or-20s-up-to-200-on-x-axis-tp3311627p3311627.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list 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.