search for: wolosin

All - I'm creating some plots in R that I would like to overlay on images that are created outside of R. I've used "image" before to plot image-like data within R, and have added vector plots on top of them, but I can't find a way to read in an external bitmap file into R and use that. Currently the external files are .png's, but I could generate a few other types,

All - I am trying to write R code to implement a recursive algorithm. I've solved the problem in a klunky way that works, but uses more memory and computing time than it should. A more elegant solution than my current one would require updating the values of a variable that is located in what I will call the "root" environment - that environment from which the original call

All - Each time through a loop I create a new dataset, which I would like to append to a list object. Each item of the list should be the data matrix created in that step of the loop; I would like the NAME (or tag) of that list item to be assigned the value of a character string: I've tried something like this: running.list <- numeric(0) for(i in 1:num.files){ ..... running.list

Dear all, I would like to know how to run an analysis of covariance in R. For example, I have a data frame ("data") consisting of two second-degree categorical variables ("diagnosis" and "gender"), one continous independent variable ("age") and one continous dependent variable ("response"). I ran a simple anova to see the effects of diagnosis