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How would one go about putting titles in each of several plots that are generated from within a call to tapply? For example I'd like the following two barplots to have titles 'Group 1' and 'Group 2', where '1' and '2' come from the levels of 'group'. group <- gl(2, 10) result <- sample(c('A', 'B'), size=length(group),

Hi R fans, I was trying to write some code in R when I realized that I was just writing a FORTRAN 77 style program in the R syntax, and hence coming nowhere near tapping the potential of R. I'm wondering what is a good reference that would help me get up to speed in programming in R (i.e., using these classes, methods, objects, accessor functions, and many other things I don't

Hello, I have two data frames, NameAndConc.df and WhichOnes.df. NameAndConc.df has two columns, the first column is the names of some material, and the second column is the concentration of active ingredient. > NameAndConc.df name conc 1 material1 0.8 2 material2 0.5 3 material3 0.4 WhichOnes.df has two columns, each of which specifies which material. > WhichOnes.df

Hello, model.frame changes the factor labels when na.action = na.omit. > f <- gl(3, 2, 6, paste('m', 1:3, sep = '')) > r <- c(NA, NA, 3:6) > mf <- model.frame(~ r + f, na.action = na.omit) > mf r f 3 3 m1 4 4 m1 5 5 m2 6 6 m2 But it seems like it should be this > mf r f 3 3 m2 4 4 m2 5 5 m3 6 6 m3 intead. How do I get the second mf? Thanks a lot,

Hello, I can't seem to make qqmath plot text. v <- rnorm(8) qqmath(~v) # this is ok, but qqmath(~v, panel=function(x, y) { points(x, y) text(0, 0, 'print me', cex=2)}) isn't ok. The axis frame is printed properly (ie, as in qqmath(~v)), but neither 'print me' nor the points show up on the graph. I can, however, see the upper half of the word 'me' in the

Hello, I'd tried to estimate the variance components for the following data set, where lab and run %in% lab are random effects, and vol is the response. lab run vol 37 2 1 0.6800000 38 2 1 0.6300000 39 2 1 0.6600000 40 2 1 0.7600000 41 2 1 0.6800000 42 2 1 0.6100000 67 2 2 0.2940494 68 2 2 0.2943254 69 2 2 0.3339296 70 2 2 0.2439775 71 2 2