On Wed, 2004-03-17 at 16:32, Mark Van De Vyver wrote: > Hi Marc, > Thanks for the response. Apologies for the lack of detail... I have used > 'boxwex', 'at' and ylim, to place things nicely, except I know have some > spare room at the end of the plot, which I would like to get rid of.... Your > suggestion to use 'add' per the example is one I had not thought of. Does > any one know of a simpler approach, to use add I'm need to create two > boxplots, a dummy (with x taking the correct range of values, say > boxplot(1:10, ylim = c(0, 100))) and the real box plot with, say 11 box > plots... > > Thanks again > Mark
Mark, I am perhaps still a bit confused. Do you have 11 'unrelated' groups of data or is it perhaps 5 pairs (10 total) plus one additional that is separate and off by itself? If it is 11 separate groups, they should space evenly across the x axis based upon the default way boxplot() handles such things. The x axis positions will be 1:11, with the same amount of space on the left and right hand sides of the plot. For example: # Create a 11 column dataframe x <- data.frame(matrix(rnorm(50 * 11), ncol = 11)) # Do the default boxplot boxplot(x) On the other hand, if you perhaps have the second scenario of 5 pairs and a separate single, you could do something like the following: # Create a plot window with x from 0.5 to 6.5 and y reflecting the # range of values in 'x' plot(c(0.5, 6.5), range(x), type = "n", ann = FALSE, axes = FALSE) # Now add boxplots for the 'odd' columns in 'x', adding the 11th # column. Set the 'at' values to pair up the first 5 cols and # plot the 11th column at x = 6.2 for symmetry. boxplot(x[, c(1, 3, 5, 7, 9, 11)], at = c(1:5 - 0.2, 6.2), boxwex = 0.2, add = TRUE, xaxt = "n") # Now add boxplots for the 'even' columns in 'x' # Set the 'at' values to pair these up with the above boxplot(x[, c(2, 4, 6, 8, 10)], at = 1:5 + 0.2, boxwex = 0.2, add = TRUE, xaxt = "n") Not sure if that is what you are looking for, but it might provide some food for thought. HTH, Marc Schwartz ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html