[R] overlaying

Dear List, I am working with a small (3 columns and 9 rows) data table, which contains 9 observations, their mean values and standard deviations (I extracted these data from a huge set and I cannot use the original data). I plotted means (y-axis) and the observations (x-axis) using the " plot() " c

[R] line graph question

Hi, I am working on some line charts and although I have a lot of resources, I cannot seem to find an answer to this question: how can I set the incrementation of values on the x-axis values so that I can see all the groups on this axis. Right now, R puts them at increments of 2 (i.e., 2, 4, 6, 8,

[R] ANOVA plotting

Dear List, I recently started using R and I have a simple question. I am running R (v. 2.12.1) and Rcmdr (v.1-6.3) on Mac (Snow Leopard). I am using a data set I used before for practicing ANOVA with R, so I know what the results should look like. I can get ANOVA table using both Rcmdr and GUI. H