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...use strings: s1 <- "myDF" S2 <- "myCol" My question is how to construct the equivalent of myDF$myCol that can be used as such. Or is there a better solution? Thanks. The help and discussions on this forum are the best. Rene ----------------------------------------- Rene Braeckman, PhD Clinical Pharmacology & Pharmacometrics Irvine, California, USA

In the example R script below, horizontal gray gridlines are drawn at y coordinates where the points are drawn with the code: panel.abline(h=y, v=xScale, col.line="gray") How do I change this so that the horizontal gray gridlines are drawn at y coordinates where the y labels are drawn? The challenge is that each panel has different y-ranges (in my real example the y-ranges and

I am trying to avoid that dotplot sorts my x-values. They are in the correct order in the data.frame and the connections between the x-y values follows this order, but the placement of the x-values on the x-axis is re-ordered. In the following example, the order should be "d1", "d8" and "d15". However, this script places "d8" at the highest x position. Any

The R script below gives values of 1 for all minimum values when I use a custom function in summaryBy. I get the correct values when I use FUN=min directly. Any help is much appreciated. The continuous information provided in this forum is fabulous as are the different R packages available. Rene # Simulated simplified data Subj <- rep(1:4, each=6) Analyte <-

I am trying to create a plot title in R with substitution by a numeric variable (Figure number N) within the text which is bold and has a subcripted part as well. Here is what I have: title <- expression(bold(paste("Figure ", N, ": Plot ", C[max], " versus CrCL"))) plot(1, main="") # Simple plot for testing N <- 5 mtext(title, line=3, font=2,