Dear Ben Bolker, Hadley Wickham, Jim Lemon and all I'm very thank to you!
I tried all suggestion and I wiil comments it next. Ben Bolker suggestion is very nice and I did a little changes in col=c(1,1),pch=c(1,16) and I include a xlab, ylab and a legend(5, 4, c("02H02","306"), pch = c(1,16), col = c(1,1)). But, I didn't could change the x-axis number division. Please, see: I got sometings like this: | | | | | +----------------------------------------------------------- 0 5 10 15 20 25 30 35 and my times are 0, 8, 12, 16, 20, 24, 28, 32 I uploaded a .ps fle to http://www.divshare.com/download/2182957-d4e showing the graph. I searched for a function to change this division but I didn't found. I looked at par() and default.plot() help pages for somethings that change the 5 spacing to 4, than I will get 0, 4, 8, 12, ... Hadley Wickham suggestion isn't possible to test because I got a error: > means <- cast(df, Mutant + Time ~ ., c(mean, se)) Error in eval(expr, envir, enclos) : invalid 'envir' argument I was searched for this error and got this to topics: http://article.gmane.org/gmane.comp.lang.r.general/56890/match=error+eval+expr+envir+enclos+invalid+argument http://article.gmane.org/gmane.comp.lang.r.general/87741/match=error+eval+expr+envir+enclos+invalid+argument Than, I suppose that there are a problem, or with my dataset or with a name of function. I didn't discovery it! Here is my sessionInfo: R version 2.5.1 (2007-06-27) i386-pc-mingw32 locale: LC_COLLATE=Portuguese_Brazil.1252;LC_CTYPE=Portuguese_Brazil.1252;LC_MONETARY=Portuguese_Brazil.1252;LC_NUMERIC=C;LC_TIME=Portuguese_Brazil.1252 attached base packages: [1] "splines" "grid" "stats" "graphics" "grDevices" "utils" "datasets" "methods" [9] "base" other attached packages: ggplot2 colorspace RColorBrewer MASS proto reshape plotrix "0.5.5" "0.95" "1.0-1" "7.2-34" "0.3-8" "0.8.0" "2.2-3" Jim Lemon suggestion is very nice, but it plot the same point for one Mutant before the some point of other Mutant in the same Time. I uploaded a .ps file to divshare for clarify what I want to explain. http://www.divshare.com/download/2182890-49c and I uploaded a true dataset: http://www.divshare.com/download/2182913-5a3 This is the result! Could you help me a little bit more? I am very thank to you!!! Best wishes -- Marcelo Luiz de Laia ______________________________________________ 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.